4CHPROR3 losing connection

I have two 4CHPROR3 installed in the same location.

One works flawlessly with no issues.

The other keeps losing its network connection. Sometimes it happens several times in a day. Sometimes it goes several days with no issues. It always reconnects on its own but in the meantime scheduled events or actions are missed.

I have checked for updates and done them all as soon as they are available. I just updated to 3.8.2 this morning.

Is this unit just failing and needs to be replaced? Is there something else I can try to get it working correctly?

Thanks for any suggestions.