I also sometimes have messages in the Kernel regarding “wlan” entering blocking/disabled/promiscuous mode, so they may or may not be “normal”.
It is likely worth updating the firmware to 3.203, since it was released back in August 2021.
It would be good to test if the problem occurs on 5 GHz band because you indicated that you can fix it by changing the 2.4 GHz channel. The 2.4 GHz band tends to be quite congested and, if 5 GHz does not have the problem, then congestion may a cause. On 2.4 GHz, you should stick to HT20 bandwidth because there is more interference with wider bandwidth.
There are various apps that display all the nearby wifi devices and their channels broadcasting on 2.4 GHz / 5 GHz. I use the Wifi Analyzer app on my Android smartphone to do a site survey and pick the channel on each band to avoid the most congestion.