I'm frequently stuck at "Connecting...". When I'm not, it's a crap-shoot whether I'll be able to access the feed or rooms for either of my courses. I can
usually
access my DMs, but not always. Answers and comments aren't appearing. Notifications don't take me to the thing they're notifying me about.
I usually use the browser interface on my laptop, but this prevents me from helping students from my phone, and I use a pinned note to take written questions in class, so this is a substantial impact on me and my students.