In Jenkins 2.222.1 a new header bar has been introduced. Seems that one of the libraries (or CSS files) that I am using in my plugins destroyed the search bar layout, see screenshot.
I still need to find out, which of the UI plugins cause these problems...
- is caused by
JENKINS-60920 Update the Header and Breadcrumb styles
Seems that we did upgrade our Jenkins as well. Here one can see the bug as well: https://ci.jenkins.io/job/Plugins/job/analysis-model/job/master/java/
Aren't you reimplementing lib/layout/layout in your plugins or something like that?
If so, would look there for the culprit.
Edited to add: Found https://github.com/jenkinsci/bootstrap4-api-plugin/commit/9465ea0fe14b0108cbfee1f3c74c2866dc5d45b9 so that's not it.
Could you clarify whether this is only in the UI refresh, or without? Screenshot shows the former, which is opt in via system property.