Side Scrollbar disappears frequently in the New Teams.

I'm getting reports of the same issue. This is a classic reason why organizations do not like the constant changing of critical communication applications. A silly UI issue is not a good sign.

Same issue here. It is really bad if you are on a laptop without touch screen. The Ctl-L is a workaround, and a scroll mouse works. But this is very frustrating.

Do all the affected people have a touch screen? My notebook has a touch screen which I really never use, but I wonder if the touch screen input is causing Teams to assume the focus isn't close to the where the scroll bar is and causing it to hide the bar?

This happened to me this morning. It forcibly shoved me into new Teams again and I had to make it go back to the old version. It kept nagging me not to which also irritated me. No, I don't really want to but the new one is way to buggy. I appreciate the workaround but I'm sticking with classic until it's fixed. I want to use the new one, but until my scrollbars work properly it's not going to happen.

I've tried this but then I'm bombarded with popups for new teams and then after a while it upgrades automatically. This may be due to my company's policy but trying to stay on the old version hasn't really worked for me.

If you resize the window slightly the scrollbar will appear. It will disappear soon after but if you can grab it before it does so you are able to use it.