Plume pods rebooting / resetting and losing internet connection

Used plume perfectly for 4 years. I have 4 pods. Direct from plume, not isp provided. Life was great. Last few days my pods have acted up. 1. Whole WiFi network goes down. Disappears. All the pods have the green light on the front. 2. HomePass shows them all disconnected. 3. After a few mins the gateway comes back online and then slowly they all reconnect. 4. It all works ok, then It happens again. Maybe 10 times today.

I have tried a few things. None of which worked. A. All on latest firmware. Note they are super pods not the new wifi6 ones. B. I changed the pods around so a different pod was the gateway. No benefit. C. I asked my isp to check the line and no issues. D. I turned on WiFi for my isp router and when the HomePods all fail, the isp WiFi still works fine and is connected to the internet.

I am in touch with plume support but other than updating the firmware (which didn’t work) they haven’t come back with anything.

Any ideas?