Having it show up in a completely unrelated location is a clear bug though.
Yes, this is a bug.
@farodin91 can you create an issue with how to reproduce?
I have no idea whtat custom avatar cache is, but if i remove one of https:///jenkins.tld it works.
I've released theme manager with the previews support: https://github.com/jenkinsci/theme-manager-plugin/releases/tag/theme-manager-1.0
PRs are open to all the theme plugins on the update center to migrate to the new API:
divs in a running build's log, so it's easier to tell which log output is fresh. Like a colored background that quickly fades away or something. Thoughts?