I just had this same issue with MS Teams on my Macbook. I had it maximised, meeting ended, wanted to click the Leave button in the top right corner, and just as

I just had this same issue with MS Teams on my Macbook. I had it maximised, meeting ended, wanted to click the Leave button in the top right corner, and just as I moved the mouse there, the button disappeared! There was no Leave button anymore. Unmaximised it instead, Leave button appears again, I try to click it, and the Leave button moves. What kind of idiot designed this?