Bug? B4A Window Overlapping on second screen

Does anyone have the same problem on the second monitor?
I had this on my Macbook on an external monitor, I had that on my stand computer (with an other Monitor) and on other computers with other monitors

I don't understand what the image shows. Can you explain in more detail? Is the B4A IDE maximised on the second monitor? What is the blue line, part of the IDE?

I have 2 Projects Open on the First Screen, all is ok, but on the second screen the maximised B4A Windows is overlapping on the first screen and this is the Blue Line on the image above.

Yes, I see something similar but only if when I maximise the IDE window it is mainly on the second screen but overlapping the main screen slightly. If I maximise it when it is entirely on the second screen it is OK. B4J does it as well but Basic4ppc (which has a different Windows Forms based IDE) is fine, as are all the other programs that I have tried so it looks like a bug in the IDE.