I will sometimes get a message notification and when I click the icon, it spins the loading animation and another refresh animation above it, but it seems to freeze/hang on actually loading the message. If I click on All messages then it loads it instantly.

Seems to happen most on messages I received while I'm actively using the app, not when it first opens and detects messages received. It will also at times do the spinning animations of it shows no messages, but I click on the icon to do a manual refresh/message check.

It's been occurring for a few days, maybe a week now, but I hadn't had much solid info on when/where there issue was coming from, but now having the click All workaround, I felt that might give you some place to start debugging. Let me know if there's anything else I might be able to look for or screenshot, as I don't know how recreatable something like this is.