FortiEdge Cloud APs - dropping at random intervals?

Hello guys,

I'm kind of at my wits ends here.

I have two FortiAP 431Gs on 7.4.5 managed via FortiLAN cloud. Both are connected to their own Fortigate 40F running 7.2.10. (So two sites, 1 AP each)

The clients randomly drop throughout the day. Sometimes they will go a day or so without drops, then the clients will start to drop at random intervals sometimes every 5 minutes, sometimes every few hours.

Looking at the logs, I do not see any error messages, just client wtp disconnect messages. CPU/Memory looks to be within acceptable bounds on both the AP and the Fortigate too.

What is interesting is we have 27 other sites with the same settings and no reported issues - only difference is at these sites the AP is managed via the Fortigates...The only thing I can think of if it has something to do with FortiEdge Cloud. if it matters, the sites with the APs are in the southeastern united states but for some reason they were deployed to FortiLAN cloud in Canada.

but I also have a test network stack with the same firewall, switch, and AP on the same firmware versions, and my AP is connected to Fortinet cloud and my connection never drops.

Wired connections are not effected, so it is definitely something with the wifi. No issues on ISP side I can see

I am losing my friggin mind. I have been chasing this for over a month now. I can't find the issue.