diff --git a/web/src/lib/canvas/canvas-resource-references.ts b/web/src/lib/canvas/canvas-resource-references.ts
index 1d6786685..512c5b11b 100644
--- a/web/src/lib/canvas/canvas-resource-references.ts
+++ b/web/src/lib/canvas/canvas-resource-references.ts
@@ -133,7 +133,11 @@ function removeCanvasMentionToken(value: string, token: string) {
 function replaceCanvasMentionToken(value: string, token: string, replacement: string) {
     if (!token) return value;
     const escapedToken = token.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
-    return value.replace(new RegExp(`${escapedToken}(?=${CANVAS_RESOURCE_MENTION_BOUNDARY.source})`, "gu"), replacement);
+    // Numbered media mentions can touch Chinese prose or another mention, but not a longer number.
+    const boundary = /^@(图片|视频|音频|文本)\d+$/.test(token)
+        ? "(?![0-9])"
+        : token.startsWith("@[node:") ? "" : `(?=${CANVAS_RESOURCE_MENTION_BOUNDARY.source})`;
+    return value.replace(new RegExp(`${escapedToken}${boundary}`, "gu"), replacement);
 }
 
 function compactRemovedCanvasMentionPrompt(value: string) {
diff --git a/web/test/canvas-resource-references.test.ts b/web/test/canvas-resource-references.test.ts
index 564aa1422..b1c78ec78 100644
--- a/web/test/canvas-resource-references.test.ts
+++ b/web/test/canvas-resource-references.test.ts
@@ -207,6 +207,19 @@ describe("canvas resource mention slots", () => {
 });
 
 describe("remove canvas resource mention tokens", () => {
+    test("断开首图时同步紧邻中文、连续引用及两位数编号", () => {
+        const images = Array.from({ length: 10 }, (_, index) => imageNode(`image-${index}`));
+        const target = {
+            ...videoNode("target"),
+            metadata: { composerContent: "@图片1@图片2的人物参考@图片10，@[node:image-1]保持一致" },
+        };
+        const nodes = [...images, target];
+        const connections = images.map((image) => connection(image.id, target.id));
+        const result = applyCanvasConnectionPromptSync(nodes, connections, nodes, connections.slice(1));
+        expect(result.find((node) => node.id === target.id)?.metadata?.composerContent)
+            .toBe("@图片1的人物参考@图片9，@图片1保持一致");
+    });
+
     test("取消引用后会清掉对应的 @图片N", () => {
         const image = imageNode("image-a");
         const target = {