Sky Q dropping network connection

[GailEvans]

We have Sky Q, 2 x mini boxes and 2 x Skybooster.

but most evenings, the main Sky Q box drops its network connection and loses all apps. It also stop a the 2 x mini boxes working (error MR104).

No issues with Wi-Fi, all other devices are fine - good broadband signal

have tried restarting, resetting all the hardware but still just drops off.

very frustrating