@Emily130 not 100% certain what you mean by "lagging" but if you mean the latency has increased which makes game play worse then it is most likely due to wifi issues including interference from neighbours' networks. This is why whereever possible use ethernet to connect devices used for gaming.
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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
