Unexplained PSK mismatch errors on WRT1900ACS

Hiya.

Running 22.03.0, I have a device (a family member's work-from-home laptop) that cannot stay connected to an encrypted network in any frequency band. Approximately 20 seconds after a successful association, it spontaneously disconnects, and any further reconnection attempts throw AP-STA-POSSIBLE-PSK-MISMATCH notices via hostapd; the Windows client then presumes the key is bad and requests a re-entry, starting the issue all over again. I've tried varying key sizes and encryption modes, but nothing seems to resolve the issue, save for disabling encryption altogether. Is it the Marvell firmware/radio that's too wacky, or am I missing some other solution?

Please upgrade to 23.05.5 first, 22.03.x is EOL and there have been changes to mwlwifi as well as severe problems with the switch drivers in 22.03.x.