diff --git a/app/src/layout/Wnd.ts b/app/src/layout/Wnd.ts
index 5c37ef705..52188354a 100644
--- a/app/src/layout/Wnd.ts
+++ b/app/src/layout/Wnd.ts
@@ -273,11 +273,13 @@ export class Wnd {
                 return;
             }
 
-            const nextTabHeaderElement = (Array.from(it.firstElementChild.childNodes).find((item: HTMLElement) => {
+            let nextTabHeaderElement: HTMLElement;
+            Array.from(it.firstElementChild.childNodes).find((item: HTMLElement) => {
                 if (item.style?.opacity === "0.38") {
+                    nextTabHeaderElement = item.nextElementSibling as HTMLElement;
                     return true;
                 }
-            }) as HTMLElement)?.nextElementSibling;
+            });
 
             if (!it.contains(oldTab.headElement)) {
                 // 从其他 Wnd 拖动过来
diff --git a/app/src/protyle/gutter/index.ts b/app/src/protyle/gutter/index.ts
index d3b34762b..72eb69f40 100644
--- a/app/src/protyle/gutter/index.ts
+++ b/app/src/protyle/gutter/index.ts
@@ -120,7 +120,8 @@ export class Gutter {
                 rowElement.querySelector(".av__firstcol use").setAttribute("xlink:href", "#iconCheck");
                 updateHeader(rowElement as HTMLElement);
                 avElement.querySelectorAll(".av__row--select:not(.av__row--header)").forEach(item => {
-                    const groupId = (hasClosestByClassName(item, "av__body") as HTMLElement)?.dataset.groupId || "";
+                    const avBodyElement = hasClosestByClassName(item, "av__body") as HTMLElement;
+                    const groupId = (avBodyElement ? avBodyElement.dataset.groupId : "") || "";
                     selectIds.push(item.getAttribute("data-id") + (groupId ? "@" + groupId : ""));
                     selectElements.push(item);
                 });
diff --git a/app/src/protyle/wysiwyg/enter.ts b/app/src/protyle/wysiwyg/enter.ts
index 39fc09fb6..fb619b325 100644
--- a/app/src/protyle/wysiwyg/enter.ts
+++ b/app/src/protyle/wysiwyg/enter.ts
@@ -118,13 +118,13 @@ export const enter = (blockElement: HTMLElement, range: Range, protyle: IProtyle
 
     // bq || callout
     const isCallout = blockElement.parentElement.classList.contains("callout-content");
+    const parentBlockElement = isCallout ? blockElement.parentElement.parentElement : blockElement.parentElement;
     if (editableElement.textContent.replace(Constants.ZWSP, "").replace("\n", "") === "" &&
         ((blockElement.nextElementSibling && blockElement.nextElementSibling.classList.contains("protyle-attr") &&
                 blockElement.parentElement.getAttribute("data-type") === "NodeBlockquote") ||
             (isCallout && !blockElement.nextElementSibling))) {
         range.insertNode(document.createElement("wbr"));
         const topElement = getTopEmptyElement(blockElement);
-        const parentElement = isCallout ? blockElement.parentElement.parentElement : blockElement.parentElement;
         const blockId = blockElement.getAttribute("data-node-id");
         const topId = topElement.getAttribute("data-node-id");
         const doInsert: IOperation = {
@@ -138,9 +138,9 @@ export const enter = (blockElement: HTMLElement, range: Range, protyle: IProtyle
             data: topElement.outerHTML,
         };
         if (topId === blockId) {
-            doInsert.previousID = parentElement.getAttribute("data-node-id");
+            doInsert.previousID = parentBlockElement.getAttribute("data-node-id");
             undoInsert.previousID = blockElement.previousElementSibling.getAttribute("data-node-id");
-            parentElement.after(blockElement);
+            parentBlockElement.after(blockElement);
         } else {
             doInsert.previousID = topElement.previousElementSibling ? topElement.previousElementSibling.getAttribute("data-node-id") : undefined;
             doInsert.parentID = topElement.parentElement.getAttribute("data-node-id") || protyle.block.parentID;
@@ -156,8 +156,8 @@ export const enter = (blockElement: HTMLElement, range: Range, protyle: IProtyle
             action: "delete",
             id: blockId,
         }, undoInsert]);
-        if (topId === blockId && parentElement.classList.contains("sb") &&
-            parentElement.getAttribute("data-sb-layout") === "col") {
+        if (topId === blockId && parentBlockElement.classList.contains("sb") &&
+            parentBlockElement.getAttribute("data-sb-layout") === "col") {
             turnsIntoOneTransaction({
                 protyle,
                 selectsElement: [blockElement.previousElementSibling, blockElement],
@@ -197,7 +197,7 @@ export const enter = (blockElement: HTMLElement, range: Range, protyle: IProtyle
             data: newElement.outerHTML,
             id: newId,
             previousID: blockElement.previousElementSibling ? blockElement.previousElementSibling.getAttribute("data-node-id") : "",
-            parentID: (hasClosestBlock(blockElement.parentElement) as HTMLElement)?.getAttribute("data-node-id") || protyle.block.parentID
+            parentID: parentBlockElement.getAttribute("data-node-id") || protyle.block.parentID
         }], [{
             action: "delete",
             id: newId,
@@ -209,7 +209,7 @@ export const enter = (blockElement: HTMLElement, range: Range, protyle: IProtyle
     }
     range.insertNode(document.createElement("wbr"));
     const html = blockElement.outerHTML;
-    const parentHTML = (hasClosestBlock(blockElement.parentElement) as HTMLElement)?.outerHTML;
+    const parentHTML = parentBlockElement.outerHTML;
     if (range.toString() !== "") {
         // 选中数学公式后回车取消选中 https://github.com/siyuan-note/siyuan/issues/12637#issuecomment-2381106949
         const mathElement = hasClosestByAttribute(range.startContainer, "data-type", "inline-math");
@@ -347,8 +347,7 @@ export const enter = (blockElement: HTMLElement, range: Range, protyle: IProtyle
         }
     }
     transaction(protyle, doOperation, undoOperation);
-    const parentElement = currentElement.parentElement;
-    if (parentElement.classList.contains("sb") && parentElement.getAttribute("data-sb-layout") === "col") {
+    if (currentElement.parentElement.classList.contains("sb") && currentElement.parentElement.getAttribute("data-sb-layout") === "col") {
         turnsIntoOneTransaction({
             protyle,
             selectsElement,
diff --git a/app/src/protyle/wysiwyg/keydown.ts b/app/src/protyle/wysiwyg/keydown.ts
index daef3a6cd..068fee64d 100644
--- a/app/src/protyle/wysiwyg/keydown.ts
+++ b/app/src/protyle/wysiwyg/keydown.ts
@@ -358,7 +358,10 @@ export const keydown = (protyle: IProtyle, editorElement: HTMLElement) => {
                         }
                     } else if (!selectElements[0].parentElement.classList.contains("protyle-wysiwyg")) {
                         hideElements(["select"], protyle);
-                        (hasClosestBlock(selectElements[0].parentElement) as HTMLElement)?.classList.add("protyle-wysiwyg--select");
+                        const parentBlockElement = hasClosestBlock(selectElements[0].parentElement);
+                        if (parentBlockElement) {
+                            parentBlockElement.classList.add("protyle-wysiwyg--select");
+                        }
                     }
                 }
             });
@@ -384,7 +387,10 @@ export const keydown = (protyle: IProtyle, editorElement: HTMLElement) => {
                         }
                     } else if (!selectLastElement.parentElement.classList.contains("protyle-wysiwyg")) {
                         hideElements(["select"], protyle);
-                        (hasClosestBlock(selectLastElement.parentElement) as HTMLElement)?.classList.add("protyle-wysiwyg--select");
+                        const parentBlockElement = hasClosestBlock(selectLastElement.parentElement);
+                        if (parentBlockElement) {
+                            parentBlockElement.classList.add("protyle-wysiwyg--select");
+                        }
                     }
                 }
             });
@@ -409,7 +415,10 @@ export const keydown = (protyle: IProtyle, editorElement: HTMLElement) => {
                             }
                         } else if (!startEndElement.endElement.parentElement.classList.contains("protyle-wysiwyg")) {
                             hideElements(["select"], protyle);
-                            (hasClosestBlock(startEndElement.endElement.parentElement) as HTMLElement)?.classList.add("protyle-wysiwyg--select");
+                            const parentBlockElement = hasClosestBlock(startEndElement.endElement.parentElement);
+                            if (parentBlockElement) {
+                                parentBlockElement.classList.add("protyle-wysiwyg--select");
+                            }
                         }
                     } else {
                         startEndElement.endElement.classList.remove("protyle-wysiwyg--select");
@@ -443,7 +452,10 @@ export const keydown = (protyle: IProtyle, editorElement: HTMLElement) => {
                             if (nextElement.getBoundingClientRect().width === 0) {
                                 // https://github.com/siyuan-note/siyuan/issues/11194
                                 hideElements(["select"], protyle);
-                                (hasClosestBlock(startEndElement.endElement.parentElement) as HTMLElement)?.classList.add("protyle-wysiwyg--select");
+                                const parentBlockElement = hasClosestBlock(startEndElement.endElement.parentElement);
+                                if (parentBlockElement) {
+                                    parentBlockElement.classList.add("protyle-wysiwyg--select");
+                                }
                             } else {
                                 nextElement.classList.add("protyle-wysiwyg--select");
                                 nextElement.setAttribute("select-end", "true");
@@ -456,7 +468,10 @@ export const keydown = (protyle: IProtyle, editorElement: HTMLElement) => {
                             }
                         } else if (!startEndElement.endElement.parentElement.classList.contains("protyle-wysiwyg")) {
                             hideElements(["select"], protyle);
-                            (hasClosestBlock(startEndElement.endElement.parentElement) as HTMLElement)?.classList.add("protyle-wysiwyg--select");
+                            const parentBlockElement = hasClosestBlock(startEndElement.endElement.parentElement);
+                            if (parentBlockElement) {
+                                parentBlockElement.classList.add("protyle-wysiwyg--select");
+                            }
                         }
                     } else {
                         startEndElement.endElement.classList.remove("protyle-wysiwyg--select");
diff --git a/app/src/protyle/wysiwyg/remove.ts b/app/src/protyle/wysiwyg/remove.ts
index 22c4d7266..b9c18f480 100644
--- a/app/src/protyle/wysiwyg/remove.ts
+++ b/app/src/protyle/wysiwyg/remove.ts
@@ -126,12 +126,13 @@ export const removeBlock = async (protyle: IProtyle, blockElement: Element, rang
                     }
                     previousID = unfoldData[foldId].previousID;
                 }
+                const parentElement = hasClosestBlock(topElement.parentElement);
                 inserts.push({
                     action: "insert",
                     data,
                     id,
                     previousID,
-                    parentID: (hasClosestBlock(topElement.parentElement) as HTMLElement)?.getAttribute("data-node-id") || protyle.block.parentID
+                    parentID: (parentElement ? parentElement.getAttribute("data-node-id") : null) || protyle.block.parentID
                 });
                 if (topElement.getAttribute("data-subtype") === "o" && topElement.classList.contains("li")) {
                     listElement = topElement.parentElement;