Since the Firmware update 14/10/2020 my BTWholehome 6 White discs have lower signal strength and my Sky Q is not stable and keeps freezing or cutting out. 1 disc showing signal -81.prior to the update all was very stable
try 1 factory reset in case the firmware has not updated correctly press the recessed button on back of hub and hold for 20/30 secs until lights flash. remember when hub reboots to turn of smart setup