@Joseph-TP yep, I've put an omada er605 in, using the archer as an wifi AP. Will check the logs in a few days to see if I've had the same issue

@Joseph-TP It happens at roughly the same time, not the same time. I have to log in and manually renew the lease. The local network remains intact, just WAN drops There is no Reboot schedule enabled....

Every night at about midnight, my router goes through this teardown and release, dropping the internet connection... I see via google it's a bug, but I can't see anything specific for this model....