The embeddable build status plugin sets the font-family to Console, "Courier New", Courier, monospace somewhere, according to browser tools.

This setting overwrites Jenkins' native fonts used, impacting components the embeddable build plugin shouldn't touch, as seen at the search bar font:

https://ci.jenkins.io/job/Plugins/job/console-column-plugin/job/master/lastCompletedBuild/badge/

The correct font layout can be seen on any other page that is not modified by the embeddable build status plugin: