"Typing" messages should not be cached
In the latest Flatpak nightly, the newly introduced support for "Typing" messages also caches them as other messages, showing a "Typing" notification from some user when re-opening the app until sync has occurred. As my "test case" was simply opening the app and noticing two or three "typing" notifications for apparently offline users, the cause of this might also be some upstream bug or just a weird coincidence.