diff --git a/lib/shared/message-utils.js b/lib/shared/message-utils.js
--- a/lib/shared/message-utils.js
+++ b/lib/shared/message-utils.js
@@ -689,7 +689,7 @@
 function isUnableToBeRenderedIndependently(
   message: RawMessageInfo | MessageInfo,
 ): boolean {
-  return !messageSpecs[message.type].canBeRenderedIndependently;
+  return messageSpecs[message.type].canBeRenderedIndependently === false;
 }
 
 function findNewestMessageTimePerKeyserver(