Multimonitor desktop Nvidia screens crash but screens connected to integrated card keep working

I have 6 monitors.
4 of them are being driven by a 3080 ti, and the other two are run by the intel integrated stuff on my 12700k.

If I try to run any game the NV screens all freeze. The content stays visible, but nothing moves. The two intel screens keep working fine. I can use the intel screens to log off, and that usually gets the NV screens back to life. Usually, but not always. Sometimes I need to hard power cycle the box.

Got excited by the other post and upgraded to 565 in the hopes that the bug mentioned there would fix the issue, but no joy. I think because that issue is around Prime, and afaik I’m not using Prime - I just have multiple screens.

When I disable the onboard intel card everything works as expected. No crashes. But then I’m down two screens.

No issues running this way in Windows. Everything works perfectly.

Any ideas? It feels like a driver bug, but I’m not sure where to start gathering the info to report it.