diff --git a/server/src/services/issues.ts b/server/src/services/issues.ts
index ae9f10b2..5cc24ffd 100644
--- a/server/src/services/issues.ts
+++ b/server/src/services/issues.ts
@@ -788,7 +788,7 @@ export function issueService(db: Db) {
 
       if (!issue) throw notFound("Issue not found");
 
-      return db
+      const [comment] = await db
         .insert(issueComments)
         .values({
           companyId: issue.companyId,
@@ -797,8 +797,15 @@ export function issueService(db: Db) {
           authorUserId: actor.userId ?? null,
           body,
         })
-        .returning()
-        .then((rows) => rows[0]);
+        .returning();
+
+      // Update issue's updatedAt so comment activity is reflected in recency sorting
+      await db
+        .update(issues)
+        .set({ updatedAt: new Date() })
+        .where(eq(issues.id, issueId));
+
+      return comment;
     },
 
     createAttachment: async (input: {
diff --git a/ui/src/pages/AgentDetail.tsx b/ui/src/pages/AgentDetail.tsx
index 327cd1aa..b57063b8 100644
--- a/ui/src/pages/AgentDetail.tsx
+++ b/ui/src/pages/AgentDetail.tsx
@@ -289,7 +289,9 @@ export function AgentDetail() {
     enabled: !!resolvedCompanyId,
   });
 
-  const assignedIssues = (allIssues ?? []).filter((i) => i.assigneeAgentId === agent?.id);
+  const assignedIssues = (allIssues ?? [])
+    .filter((i) => i.assigneeAgentId === agent?.id)
+    .sort((a, b) => new Date(b.updatedAt).getTime() - new Date(a.updatedAt).getTime());
   const reportsToAgent = (allAgents ?? []).find((a) => a.id === agent?.reportsTo);
   const directReports = (allAgents ?? []).filter((a) => a.reportsTo === agent?.id && a.status !== "terminated");
   const mobileLiveRun = useMemo(