did you have time to look for this topic?
The file icons in the sreenshot panel (simple list) are really disappearing when switching "Toolbar icon sizing" to bigger icons (24, 32, 48, 64)
and the screenshot folder is on a synchronized folder (e.g. onedrive) with overlay-icons. (picture in first post 08-07-2020).
If I use another screenshot folder without overlay-icons, I can use bigger icons without problems.
But I need the screenshot folder in the cloud.