diff --git a/src/app/course/[courseName]/calendar/day/getStatus.tsx b/src/app/course/[courseName]/calendar/day/getStatus.tsx
index 6caf87a..23f5482 100644
--- a/src/app/course/[courseName]/calendar/day/getStatus.tsx
+++ b/src/app/course/[courseName]/calendar/day/getStatus.tsx
@@ -108,6 +108,12 @@ export const getStatus = ({
         markdownToHTMLSafe({
           markdownString: assignment.description,
           settings,
+          replaceText: [
+            {
+              source: "insert_github_classroom_url",
+              destination: assignment.githubClassroomAssignmentShareLink || "",
+            },
+          ],
         }),
         canvasAssignment.description
       );
diff --git a/src/app/course/[courseName]/modules/[moduleName]/assignment/[assignmentName]/AssignmentPreview.tsx b/src/app/course/[courseName]/modules/[moduleName]/assignment/[assignmentName]/AssignmentPreview.tsx
index 03bbc88..7c25fa1 100644
--- a/src/app/course/[courseName]/modules/[moduleName]/assignment/[assignmentName]/AssignmentPreview.tsx
+++ b/src/app/course/[courseName]/modules/[moduleName]/assignment/[assignmentName]/AssignmentPreview.tsx
@@ -59,7 +59,15 @@ export default function AssignmentPreview({
       <hr />
       <br />
       <section>
-        <MarkdownDisplay markdown={assignment.description} />
+        <MarkdownDisplay
+          markdown={assignment.description}
+          replaceText={[
+            {
+              source: "insert_github_classroom_url",
+              destination: assignment.githubClassroomAssignmentShareLink || "",
+            },
+          ]}
+        />
       </section>
       <hr />
       <section>
diff --git a/src/components/MarkdownDisplay.tsx b/src/components/MarkdownDisplay.tsx
index c1c93cb..9670757 100644
--- a/src/components/MarkdownDisplay.tsx
+++ b/src/components/MarkdownDisplay.tsx
@@ -6,9 +6,14 @@ import { LocalCourseSettings } from "@/features/local/course/localCourseSettings
 export default function MarkdownDisplay({
   markdown,
   className = "",
+  replaceText = [],
 }: {
   markdown: string;
   className?: string;
+  replaceText?: {
+    source: string;
+    destination: string;
+  }[];
 }) {
   const { data: settings } = useLocalCourseSettingsQuery();
   return (
@@ -17,6 +22,7 @@ export default function MarkdownDisplay({
         markdown={markdown}
         settings={settings}
         className={className}
+        replaceText={replaceText}
       />
     </SuspenseAndErrorHandling>
   );
@@ -26,16 +32,25 @@ function DangerousInnerMarkdown({
   markdown,
   settings,
   className,
+  replaceText,
 }: {
   markdown: string;
   settings: LocalCourseSettings;
   className: string;
+  replaceText: {
+    source: string;
+    destination: string;
+  }[];
 }) {
   return (
     <div
       className={"markdownPreview " + className}
       dangerouslySetInnerHTML={{
-        __html: markdownToHTMLSafe({ markdownString: markdown, settings }),
+        __html: markdownToHTMLSafe({
+          markdownString: markdown,
+          settings,
+          replaceText,
+        }),
       }}
     ></div>
   );
diff --git a/src/features/canvas/services/canvasAssignmentService.ts b/src/features/canvas/services/canvasAssignmentService.ts
index 43da076..d40ca1b 100644
--- a/src/features/canvas/services/canvasAssignmentService.ts
+++ b/src/features/canvas/services/canvasAssignmentService.ts
@@ -32,16 +32,14 @@ export const canvasAssignmentService = {
     const content = markdownToHTMLSafe({
       markdownString: localAssignment.description,
       settings,
+      replaceText: [
+        {
+          source: "insert_github_classroom_url",
+          destination: localAssignment.githubClassroomAssignmentShareLink || "",
+        },
+      ],
     });
 
-    const contentWithClassroomLinks =
-      localAssignment.githubClassroomAssignmentShareLink
-        ? content.replaceAll(
-            "insert_github_classroom_url",
-            localAssignment.githubClassroomAssignmentShareLink
-          )
-        : content;
-
     const body = {
       assignment: {
         name: localAssignment.name,
@@ -51,7 +49,7 @@ export const canvasAssignmentService = {
         allowed_extensions: localAssignment.allowedFileUploadExtensions.map(
           (e) => e.toString()
         ),
-        description: contentWithClassroomLinks,
+        description: content,
         due_at: getDateFromString(localAssignment.dueAt)?.toISOString(),
         lock_at:
           localAssignment.lockAt &&
@@ -90,6 +88,13 @@ export const canvasAssignmentService = {
         description: markdownToHTMLSafe({
           markdownString: localAssignment.description,
           settings,
+          replaceText: [
+            {
+              source: "insert_github_classroom_url",
+              destination:
+                localAssignment.githubClassroomAssignmentShareLink || "",
+            },
+          ],
         }),
         due_at: getDateFromString(localAssignment.dueAt)?.toISOString(),
         lock_at:
diff --git a/src/services/htmlMarkdownUtils.ts b/src/services/htmlMarkdownUtils.ts
index 5686571..ee9a337 100644
--- a/src/services/htmlMarkdownUtils.ts
+++ b/src/services/htmlMarkdownUtils.ts
@@ -90,14 +90,12 @@ export function markdownToHTMLSafe({
   replaceText?: { source: string; destination: string }[];
 }) {
   const html = markdownToHtmlNoImages(markdownString);
-  if (convertImages) return convertImagesToCanvasImages(html, settings);
-
-
   const replacedHtml = replaceText.reduce(
     (acc, { source, destination }) => acc.replaceAll(source, destination),
     html
   );
-  // return html;
+
+  if (convertImages) return convertImagesToCanvasImages(replacedHtml, settings);
   return replacedHtml;
 }
 
diff --git a/src/services/utils/htmlIsCloseEnough.ts b/src/services/utils/htmlIsCloseEnough.ts
index b9655ad..5decd4b 100644
--- a/src/services/utils/htmlIsCloseEnough.ts
+++ b/src/services/utils/htmlIsCloseEnough.ts
@@ -1,6 +1,7 @@
 const scriptRegex = /<script.*?<\/script>/g;
 const linkTagRegex = /<link\s+rel="[^"]*"\s+href="[^"]*"[^>]*>/g;
-const htmlAttribute = /\s+\w+="[^"]*"|\s+\w+='[^']*'|\s+\w+=[^\s>]+/g;
+const nonHrefAttribute =
+  /\s+(?!href\s*=)\w+="[^"]*"|\s+(?!href\s*=)\w+='[^']*'|\s+(?!href\s*=)\w+=[^\s>]+/g;
 
 function replaceUnicodeEscapes(input: string) {
   return input.replace(/\\u[\dA-Fa-f]{4}/g, (match) => {
@@ -14,7 +15,7 @@ export const removeHtmlDetails = (html: string) => {
   return withoutUnicode
     .replaceAll(scriptRegex, "")
     .replaceAll(linkTagRegex, "")
-    .replaceAll(htmlAttribute, "")
+    .replaceAll(nonHrefAttribute, "")
     .replaceAll(/\\"/g, '"')
     .replaceAll(/\s/g, "")
     .replaceAll(/<hr\s*\/?>/g, "<hr>")
@@ -32,5 +33,45 @@ export const removeHtmlDetails = (html: string) => {
 export const htmlIsCloseEnough = (html1: string, html2: string) => {
   const simple1 = removeHtmlDetails(html1);
   const simple2 = removeHtmlDetails(html2);
+
+  if (simple1 !== simple2) {
+    const len1 = simple1.length;
+    const len2 = simple2.length;
+    const maxLen = Math.max(len1, len2);
+
+    let firstDiff = -1;
+    const diffs: Array<{ index: number; a: string; b: string }> = [];
+
+    for (let i = 0; i < maxLen && diffs.length < 10; i++) {
+      const a = simple1[i] ?? "∅";
+      const b = simple2[i] ?? "∅";
+      if (a !== b) {
+        if (firstDiff === -1) firstDiff = i;
+        diffs.push({ index: i, a, b });
+      }
+    }
+
+    const ctx = 30;
+    const start = Math.max(0, (firstDiff === -1 ? 0 : firstDiff) - ctx);
+    const end1 = Math.min(len1, (firstDiff === -1 ? 0 : firstDiff) + ctx);
+    const end2 = Math.min(len2, (firstDiff === -1 ? 0 : firstDiff) + ctx);
+
+    const mark = (s: string, sStart: number, idx: number, sEnd: number) => {
+      if (idx < 0) return s.slice(sStart, sEnd);
+      const before = s.slice(sStart, idx);
+      const ch = s[idx] ?? "∅";
+      const after = s.slice(idx + 1, sEnd);
+      return `${before}[${ch}]${after}`;
+    };
+
+    console.log("htmlIsCloseEnough: differences detected");
+    console.log(`len1=${len1}, len2=${len2}`);
+    if (firstDiff !== -1) {
+      console.log(`firstDiffAt=${firstDiff}`);
+      console.log("s1:", mark(simple1, start, firstDiff, end1));
+      console.log("s2:", mark(simple2, start, firstDiff, end2));
+    }
+    console.log("first 10 diffs:", diffs);
+  }
   return simple1 === simple2;
 };