Board Thread:Support Requests - Getting Technical/@comment-746824-20201025212312/@comment-9605025-20201025214006

You are not the first person to ask about this (see here). There are two types of "thumbnails". The first type refers to the display style used by MediaWiki when you use "thumb". The other refers to how Fandom serves the images to the wiki. The thumbnailing that is the issue is the latter; so not using "thumb" doesn't make a difference. There are two options, you can either convert your APNGs to AGIFs or you can hotlink the non-thumbnail versions. In general, hotlinking is discouraged because is messes with maintenance reports.