Broken meeting interface

[R6D]

During a meeting, the icons for all participants are too small. Also, the rectangles themselves indicating the participants are smaller in size than they should be. How can I return everything to default? Switching view settings doesn't help.

[R6D]

Here is the picture:

https://1drv.ms/i/s!AuI56Fpf3zYYgY52lLrhhvx-oSnG1A?e=ow6A4x