App won’t reconnect after “minimized”

Maybe I’m doing something wrong here or maybe it’s just how the app is but why for 7+ years and 5 different phones does the app have to be force closed and reopened in order for it to reconnect and be usable after “minimizing” the app on your phone after using it? Notifications of messages still pop up fine….but if I want to respond to anyone I have to force close and reopen the app or it will sit on “reconnecting” until my phone runs out of battery.