Board Thread:Support Requests - Designing Your Wiki/@comment-34797220-20200711122034/@comment-26611127-20200713022331

What I meant was to upload the same image manually on to your wiki, under a different filename name like  or something or the sort. It would also be helpful to know what happens when the same file is uploaded as a background on a different wiki.

The intent was to help find out if there is an issue with the image itself, an issue your wiki's theme designer, or an issue with all files uploaded onto your wiki.

If you've already tried my suggestion, you can to report the issue to them, and they can help you discover if this is a bug or not.