Page previews for some pages show a pixelated icon instead of the correct thumbnail.
First noticed on cswiki in T182321#3990934. I can also reproduce the same on a few enwiki pages. From the Recent Changes page:
- https://en.wikipedia.org/wiki/M%C3%A5rten_Andersson
- https://en.wikipedia.org/wiki/Rift
- https://en.wikipedia.org/wiki/Cyril_Ramaphosa
- https://en.wikipedia.org/wiki/UltraEdit
Strangely enough, it's not all of them. Here are some from RC that show the correct thumbnail for me:
My best explanation at this time for the ones showing the correct thumbnail is probably caching.