PPT share screen

Since 2020 I often attend online conferences. I have noticed that one problem arises again and again.
Let us suppose, that a person wants to share his presentation. In order to do it in slide show mode, he should chose "share entire screen" option. But usually people chose to share only powerpoint window. It would be OK, but when the person presses F5 to start slide show, the audience does not see it. They see only ppt work area, but not the slideshow. 
It causes confusion at the conference, and the speaker looses his temper.

It would be great, if when the person choses to share only ppt window, the slideshow would work correctly.