diff --git a/services/platform-service/src/modules/telemetry/routes.ts b/services/platform-service/src/modules/telemetry/routes.ts
index bce67fb3..ae5f42c0 100644
--- a/services/platform-service/src/modules/telemetry/routes.ts
+++ b/services/platform-service/src/modules/telemetry/routes.ts
@@ -116,7 +116,7 @@ async function sendClusterAlert(
         type: 'section',
         text: {
           type: 'mrkdwn',
-          value: [
+          text: [
             `*Telemetry Error Cluster Escalated*`,
             `*Event:* ${cluster.module}/${cluster.eventName}`,
             `*Platform:* ${cluster.platform} (${cluster.channel})`,
@@ -424,8 +424,12 @@ async function updateClusterForEvent(event: TelemetryEventDoc): Promise<void> {
     if (uid && event.userId && !existing.affectedUserIds.includes(uid)) {
       if (existing.affectedUserIds.length < 100) existing.affectedUserIds.push(uid);
     }
-    if (uid && event.anonymousInstallId && !existing.affectedInstallIds.includes(uid)) {
-      if (existing.affectedInstallIds.length < 100) existing.affectedInstallIds.push(uid);
+    if (
+      event.anonymousInstallId &&
+      !existing.affectedInstallIds.includes(event.anonymousInstallId)
+    ) {
+      if (existing.affectedInstallIds.length < 100)
+        existing.affectedInstallIds.push(event.anonymousInstallId);
     }
     if (!existing.affectedOsFamilies.includes(event.osFamily)) {
       existing.affectedOsFamilies.push(event.osFamily);
@@ -861,6 +865,10 @@ export async function telemetryRoutes(app: FastifyInstance) {
     if (parsed.data.status === 'resolved' || parsed.data.status === 'ignored') {
       updates.resolvedBy = req.jwtPayload?.sub ?? 'unknown';
       updates.resolvedAt = new Date().toISOString();
+    } else if (parsed.data.status === 'open') {
+      // Clear resolution metadata when reopening
+      updates.resolvedBy = undefined;
+      updates.resolvedAt = undefined;
     }
 
     const updated = await repo.updateCluster(id, pk, updates);