I've been using TC for many many years, but I'm far from being a power user ... so please don't slap if my issue is stupid

My "Screenshots" directory contains bith jpg and png (I think Windows' Snipping Tool now save in png by default ...) but the thumbnail view doesn't work fine in this folder.
For a reason, the thumbnails of jpg are visible, but not the thumbnails of png files :
Image: https://i.ibb.co/XWCWG4M/Screenshot-2023-09-09-102203.png
My thumbnails settings are as below :
Image: https://i.ibb.co/fNH2Mv7/Screenshot-2023-09-09-102756.png
I have same behaviour with TC 11 and TC11.01.
Interesting thing is that if I move all my screenshots in another folder (ex c:\temp), the thumbnails from the other folder are perfectl ...
So it seems to be related to my folder "C:\Users\Martin\OneDrive\Images\Screenshots" ...
I then noticed that there is a dicrepancy between the folder names of my OneDrive in Windows Explorer versus in TC :
Image: https://i.ibb.co/q09ny60/Screenshot-2023-09-09-103734.png
(My Windows was in French before I switched it to English ...)
If you have any advice or if I can give more details, let me know

Martin