Used past tense cause I quit (not cause of that), also cause after a while people got used to it and found workarounds.

It still has a timeout, just a longer one, and there's some caveat about the other side sending first that I forget. The only solid solution is to discuss everything in a space instead of a regular group/1:1 chat.

This doesn't work when someone else outside of the group initiates a conversation.

It's a fantastic feature; meaning I am never distracted on a European Monday morning by what someone sent me on an American Friday afternoon. ;)