same issue i spent 28 hours to fix try different formats compress and uncompress..etc
Viewing post in Gif's suddenly not animating
I did some screenshot testing and reported the results in the other gif thread:
Basically, the itch servers are delivering single-frame versions of animated gif screenshots, which is why they don't animate. As noted in the post, the animated version of my screenshot image is still on the itch servers and animates on the page correctly with a simple url change via dev tools (not a permanent fix). This indicates the issue is not related to gif file encoding before upload.