@Msilva assume you mean you have split the 2 wifi bands and it is the 2.4GHz band that you are having issues with - 2g and 5g refer to mobile networks and are entirely different technology.
The 2.4GHz wifi band is often affected by interference from your neighbour's WiFi networks as it only has room for 3 or at most 4 networks without interference. You can try rebooting your Sky hub which will try to find the channel with the least interference but you may have to do thst quite frequently. Alternstively you can try to find the best channel yourself manually try ch1,6,11, 3 or 9 but again you msy hsvecto do thst quite frequently. You can download an app called Wifi Analyzer onto a windows or Android ceveice which will show you graphically what channels the networks within range ofvtgecdevices wifi adapter allowing a more scientific approach.
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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
