Not sure if this has been posted before but;
Whenever I enter a channel and send a message, twitch chat will hide itself as if I hit the arrow to hide it in the top right. But after it hides itself, there is no arrow to bring it back out. Popping out the chat in a separate window then sending the message will cause the window to hit an error and not load. It doesn’t seem consistent as well, but it does happen more often than not. A gif to this bug can be found here (sorry about the small size, but it’s the best I could do)