If you feel happy about making changes to the Windows Registry there i8s a setting that can be changed regarding the position.
The Registry path is shown below.
The Default position - @Point - values on my system were:
After moving the Avatar Proportion panel and closing it the new position - @Point - values are:
These values were taken from a 1920 x 1080 resolution screen.
You could change the values in the Registry to something like the above and see if that helps.
System: Win 10 Pro (1909), Asus X99-E WS, CPU i7-5930K -3,5 GHz, 32 GB DDR4 2666-16 RAM, NVidia GTX 1080 Ti GPU - 11 GB VRAM(Driver Studio-442.19), Samsung 850 Pro 512 GB SSD, 6 TB HD storage.