Manually trigger branch pipelines

When I go to the branches tab and select "Run pipeline for a branch", I can see my pipelines for branch rules defined in my bitbucket-pipelines.yml, but I am unable to actually trigger one of those pipelines manually. Specifically, when I click "Run" I get a loading icon indefinitely and the pipeline never runs.

I'm not sure if this is a bug or simply a non-existent feature. In either case, I think this function would be useful to have in cases where branch-based rules are added/modified and
we want to run the new pipeline for an existing branch.