Run a custom pipeline but not master branch

Hi all,

Setup:

I am new to bitbucket pipelines and just recently set all up. I have 3 custom pipelines and 1 pipeline for branch "master".

What I want:

Now I would like to run one of those 3 custom pipelines for a branch which is not the master branch.

Steps to reproduce:

Therefore I go to "pipelines" and click on the "Run pipeline" Button on the upper right corner. A modal displays where I must select a branch first and then the pipeline.

If I select the master branch the select for the pipeline is populated with my 3 custom pipelines and the 1 for the master branch.

Problem:

If I select a branch which is not the master branch, I can't select any pipeline because no pipeline is displayed to be selected.

Question:

What is wrong here? Am I missing something?

What I already tested:

I thought maybe it just works with the master pipeline because I have 3 custom pipelines and 1 for the master branch. So I added a "default" section just to have something for all other branches. I hoped that this will display the custom pipelines in the select when I want to run a pipeline not for the master branch, but it don't.