Keep the separate window open on RDP

Hi 1P_Gem. I'll try to put some examples here.

If RDP is on fullscreen and I open the separate window. The window shows up as expected on top of RDP. But after the separate 1P window is minimized, I can't bring it on top of RDP again, regardless of whether using the autofill or not. Alt + Tab or manually picking the window with Alt + Tab pressed, doesn't work, the window is there but nothing happens if you select it.

Now to your questions.

After the separate credential window minimizes, is it still remaining open on the device in the background, even if it can't actively be used again with RDP on full screen?
- It remains open, but you can't make it show on top of RDP on fullscreen again.

If you hold down Alt and then press and release Tab, is this smaller Window listed at all, and if so, where is it - for example is it the 2nd or 3rd listed?
- It's listed, but nothing happens if you pick the window by releasing the tab or clicking on it with Alt + Tab held down.

If it is listed, are you able to use the mouse or arrow keys to activate it?
- You can navigate to it, but the window won't show on top of RDP, it's as if nothing happened.

Now something peculiar I noticed today, is that:
After you minimize the 1P separate window, if you press the Windows key and click the 1P separate window open in the taskbar. The window shows up on top of RDP, and you can drag and drop info once or twice from the 1P window to the RDP, but after that, it glitches again.