In a matrix project there is an option in the postbuild step to set the build-description in the parent build. The documentation says

Also set the description on a multi-configuration build. The first
description found for any of the invididual builds will be used as
description for the multi-configuration build.
This only applies to multi-configuration projects.

I set the build description to the actual git-branch built. With v1.10 now this information is shown as often as configurations are used.

This is not what I'm expecting, the description text should be there only once (as documented).

This my be related to JENKINS-26671