Gifs working in "Preview in browser" but not when I publish webpage

Hello! I really need help.
I made hero background with gif that works perfectly in “View mode” and “Preview in browser” but then I published my test version of the site on server…there is nothing in places where should be gifs. It is written that Blocs support gifs in any size.

Update: It started to work on Safari, but every other browser…nothing.

Maybe you’ll give us a link for deeper inspection :wink: