Try resizing the window.

Nope.
But it sounds like windows messing with Resolume.

Check the folder you have set up for recoding, it should have the files stored instantly, but you might not be able to drop them to your composition until they finished writing. If you have lots of VRAM, you could make a Wire patch which stores the frames of your capture clip into memory, and rewind...

Separate decks per song would be recommended,
also check out the AutoPilot feature https://resolume.com/support/en/layers#auto-pilot

USB adapters often don't give the speed they promise.
How fast does a file copy from one machine to the other?

Also make sure Wifi adapters are disabled on both machines. NDI tends to default to the Wifi adapter for some reason.

Is there enough free space on the target drive?

Do the source files play in the composition?

It's in the nvidia control panel.

Is Resolume assigned to run on your most powerful GPU?
https://resolume.com/support/en/tech-specs

Hmm, I think what's going on is when you click minimize, windows will try to minimize all windows, and Resolume is then fighting to get them visible again.
Resolume outputs are just borderless windows.

How about sending the column trigger from the Wire patch, then you'd know exactly which column is playing.