I use an Edgerouter ERX as my main router which is connected to an Arris cable modem (set to bridge mode). There are some devices connected by cable (eg. Synology NAS, Desktop Computer,...) and there is a Netgear R7800 also running OpenWRT configured as my WIFI AP.
This configuration works fine if the Edgerouter is running EdgeOS or OpenWRT 18.06. But as soon as I install OpenWRT 19.07 the router freezes randomly about once a day.
I read, that sometimes there are overheating issues, but when heating up the device deliberately I could not provoke a freeze. I also tried using a different, more powerful power adapter but the freezes still occur (I used a 12V power supply but haven't tried PoE yet). Logging to a remote log server did not give any useful information either.
Has anyone else experienced similar issues or is there something I could still try to figure out the cause of the problem?