Resolution Changing

Hi
I've got a really annoying issue that every time my Mac wakes from sleep, my Windows 11 guest has changed its resolution. I'm running Sonoma 14.5 in full screen mode with "best for retina" enabled. My MacBook is connected to an LG Ultrafine 5K and that's where I have Parallels in full screen mode.

The normal resolution within Windows is 5120 x 2800, but after sleep it drops to 3600 x 2338. This has only just started happening recently.

Just wondering if anyone else has experienced this or has a workaround as it's really annoying to keep changing the resolution back.

Thanks,
Mike.