add bar with system track in galley view no possible

I have worked on this file and wanted to add a bar at the end of the piece in galley view via the plus button in the system track but nothing happened.

I attached a shorted version of this file here. When I try to add a bar at the end nothing happens in galley view. (298 KB)

I wonder whether maybe you’re being affected by this issue?

I don’t know. Does it work with this file in the latest built of 2.1?

Yes, certainly.

Thank you.