@Lawben there are two settings which can help overcome this both are in the Startup and Standby section of the settings. The first is to enable the Stay networked in standby and the second is to turn off the network power saving option. This helped my own set to stay connected.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
