I've never had any issues activating iMessage, but since I've upgraded to Catalina, I've noticed odd bugs/behavior with it. I haven't read other people exhibiting similar issues, so I'm wondering if it's just me?
The main issue I seem to be experiencing with iMessage is for some reason, if I send a txt, then close iMessage, if I reopen the app, occasionally the exact same text from the last message I already sent will be pre-filled in the re-opened window (ready to be sent again). This effectively has lead to some friends saying it always 'looks like I'm typing' to them for some reason (they get the little 'triple dot' icon on their screens constantly).
I've also noticed that iMessage doesn't always seem to properly remove conversations until I fully reboot the computer. Say I receive a txt from someone, and I click the x to close the conversation inside iMessage, then quite the app. If I re-open iMessage, that conversation often (but not always) shows back up, even though they haven't sent another message. If I reboot the computer, the conversation is closed properly as I would expect it. (Note, this is different from unchecking the 'save history when conversations are closed option). It's almost like the app is reading off of a cache somewhere or something, which is cleared when I reboot the computer.
Neither of these issues happened to me when I was on High Sierra. Anyone have any ideas? This is one of the last few remaining annoyances I'm experiencing on this build. iMessage, FaceTime, etc are otherwise all working as expected. Nvram is working. I've tried removing the caches for iMessage, network interfaces, and generating new serials. Problem still persists.