It's been few days and I tried emptying my own cache several times but I think there might be an issue with the thumbnails rendering (for example here)

The images thumbnails are all rendered in a weird way, making the images hard or even impossible to see correctly. After having analyzed a bit in the browser, it seems it is using a version of 10px to render the image even though this is not the requested size on the page (on the wiki's main page, it asks for a 350px resize). So for example, the image "SongBanner.png" on the main page, it uses this URL to render it.

All the images in the upload log also have this issue. It shows a resized version of a 10px thumbnail of the original image. Issue seems to have started near... Mid/end of June?

Changing web browser doesn't change the issue. I'm working with Firefox, I tested with Chrome, no dice.

It also alters some images used from WikiCommons directly, but not all of them. The Ambox type images also have this problem, but not the Imbox ones.

Any way for the thumbnails to come back to normal and to stop using these 10px versions? Thanks