WiFi doesn't work intermittently; need to boot into Windows to fix it

Notorious.

Yes, that card is unstable on GnuLinux.
You might ensure the module prober is using iwlwifi for it, but aside from that, my usual recommendation is to replace it or use a WiFi dongle.
You can do a search on Wi-Fi 6 AX200 to see just how persistently it remains a trouble-maker.