@matrix Oh hey I didn't expect the actual Matrix Foundation in my replies this morning.

Thank you though, I didn't realize that clients only notified after attachments have been decrypted and I figured out what was up. Media messages coming from the Google Messages Mautrix bridge get stuck at the "Waiting for attachment to decrypt" phase despite the fact that the decryption completes successfully, so it never sends the chat notification. I'm curious how a bridge would affect attachment decryption, but at least I know what's up now. Thanks!