I have the same issue here, even updated to the latest firmware available. I have an OS 3.0 (I think) but it has a clear case, powered by an AC/DC adapter.
If I look at the logs on my WR33 meraki access point, when the unit isn’t responding, I can see “invalid credentials” for that wireless client.
I do not have this issue on my opengarage unit (mentioning because the setup screens for wifi are identical)
Perhaps it’s attempting to use a bad auth method during a key rotation or something? Not sure how to dig into the system logs to find a corresponding entry.