diff --git a/lib/push/send-utils.js b/lib/push/send-utils.js
--- a/lib/push/send-utils.js
+++ b/lib/push/send-utils.js
@@ -166,6 +166,10 @@
 
   for (const threadID of threadsToMessageIndices.keys()) {
     const threadInfo = thickRawThreadInfos[threadID];
+    if (!threadInfo) {
+      console.log(`getPushUserInfo could not find ${threadID} in ThreadStore`);
+      continue;
+    }
     for (const memberInfo of threadInfo.members) {
       if (
         !isMemberActive(memberInfo) ||