Hi! We purchased the AX3000 Deco X55 (3-Pack) last month and it's been working great until recently. Signal strength has been strong on all 3 devices and nothing has changed with our ISP but the past week the second deco has been dropping to "medium strength" randomly.

the current configuration is:

coax to modem. Deco 1 plugged directly into modem. Deco 2 upstairs and also hardwired into modem. Any ideas? We've rebooted/restarted several times without any effect.