Same on my games, cover image works as intended (hover to play) but the banner, screenshots and gifs in devlog posts don't animate.
Old gifs embedded in the game description work. Screenshots animate only if i click on them and it opens them zoomed in.
Here are affected projects if that helps:
https://sabresnout.itch.io/dotami-vrm
https://sabresnout.itch.io/cheemsbonker-rebonkd
3 days ago or so screenshots animated, but now even they don't.