[1.5.5] 4th instance UI disappear

As the image below, UI get weird when I open 4 instances at the same time. 1.0.7 is free of this problem.
Tested on 2 machines with different DAWs.
Screenshot is on Windows 11 Pro 22H2, REAPER 7.11.

I think this is a known bug, unfortunately you’ll just have to manage how many instances are open at once :confused: