Windows Invisible Bar (using Jump Desktop on windows)

Hello.

I installed Jump Desktop on my iPad to use my Windows computer remotely from my iPad, and I am satisfied with that. I still want to test using an external monitor on my iPad by placing Jump Desktop on the External monitor with Stage Manager.

But in the meantime I tried using it to access another Windows computer with another windows computer, and I really like it, considering what the competitors offer but I have a slightly strange bug, whenever I open it in mode to match the screen resolution, I get a transparent bar above the bar of windows and if i put some window our  something maximized, it doesn't go beyond that bar. Is there any solution for this?

And is it possible to choose in which resolution as it happens on the iPad?