Just noticed this strange error—it must have started very recently. Clearing the cache and disabling plugins don't have an impact.
Using a CSS transform on .category-link causes the underlying thumbnail to disappear in Chrome and Internet Explorer.
The following styling was used in "Custom CSS for Desktop Version"
Internet Explorer Result
When I remove -webkit-transform, -ms-transform, and transform, the images reappear, but unfortunately the text is no longer rotated.
This issue seemingly appeared out of nowhere, and of all the browsers to be affected, why IE + Chrome? Firefox and Safari are fine. Weird!
I'll disable rotation for now, but am eagerly looking for a solution. If I can provide any more information to help please let me know.
Also—I realize styling issues/bugs may be out of scope for your help—but I wanted to post just in case you do have any ideas or anyone else does. Thanks!