We're experiencing the same issue with this completely new RV320.
Usually from a reboot, the machine states WAN1 is connected/inactive, and cannot really go any kind of site visitors between the WAN as well as the LAN. Disabling the particular WAN1 slot after which it re-enabling seems like to resolve the challenge. The reboot will still only at times resolve the idea.
Were utilizing WAN1 solely, that link to a new Cisco DPC3825 wire modem/router that is with link function.