Not sure if this is related, but I do know that for a while now, when I see an alliance member request Team Ups there is not any accompanying message. Then when I reload the game, I can see their chat message saying which TUs they prefer. So, similarly as above, chats are not displayed until I reload the game.
Alliance chat has been buggy ever since launch. It often requires a hard restart of the app in order to refresh. I don’t know what crappy technology it attempts to use, but it has never been addressed by the old devs. Here’s to hoping the new devs will finally improve it (but I wouldn’t get my hopes up if I were you). [edit: cr to the appy is filtered out? really now?]