Guest window resizes when I disconnect laptop host from wall power

M1 Pro... I am running Parallels 19.4.1 on OSX 14.5 with a Windows 11 guest. Works great, but one behavior is quite annoying.

I normally adjust the guest window to fill my laptop screen. I then use the guest as normal. When I disconnect my laptop from power to move to another area of the house, the guest window "hides" and shrinks in size. I then have to go into control center, click on the guest, and restore the window. The window is now a smaller size, so I drag its edges to expand it again.

Sounds like a small problem, right? The real issue is what happens inside my guest when the window resizes during the power disconnect. Since the guest window shrank, all of my carefully adjusted and sized windows within the guest are moved. The guest detects the resolution change, forces it on the open apps, and ruins my careful setup.

How can I *prevent the guest window from resizing* when I disconnect my laptop from power?

 

The answer is simple though annoying. The guest window must be expanded to fullscreen. Even though disconnecting power will sometimes hide the window, it does NOT change its dimensions. Therefore, this solves my issue at the cost of having the guest window set to fullscreen.