It asks me a quality survey after every call even though I have surveys off.

It shows unread messages for a chat that has the focus and the “unread” message is visible.

When using the keyboard shortcut to create a new message (Command-N) it drops the first character of the recipient unless I introduce a noticeable delay between shortcut and recipient.

I’m sure I have more, but these are just from memory.

I just click the X rather than leave and I don’t get the survey popup. I mute most of the group chats. But it still shows unread so I know to go back and look at them

If I try to play a video in a chat, and then press the three dots to go full screen or change quality or scroll through the video, it just jumps to the top of the chat. Messages do not sync between devices. Microphone or video sometimes do not work and requires a restart. Sending attachments often just results in a failed message. Note these happen on all the OS I have triend on high end devices and on extremely high end internet 10-gigabit.

There is also just feature jank like for instance you cannot have two instances open at the same time if you have two organisations that you work for, you have to switch constantly. This is a disaster for any consultants or contractors who are placed in-org on teams.

The calendar space for an all day event takes up a sliver of space on the calendar, meaning people will often instead schedule an event for 9-5 or worst case 12-12 hours so it's not missable on the calendar easily etc...

Most recently I had it put meetings on a different day because something was broken with it's outlook integration w.r.t starting the week on a Sunday vs Monday.