@Setag boosters need to be positioned in an area with good wifi signal from the hub so no more than hafwsy between the hub and where you need the boost.
Losing signal one room from the hub is unusual but possible if the wall is very dense or thick or but check the problem isnt something simple like a radiator blocking the signal as any metal, including foil faced insulation board, will block the signal totally. Positioning the hub out in the open on a surfsce above obstructions like radiators should help. Otherwise placing the booster in the hall where it can pick up the signal coming through the door may work .
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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
