Many reasons why but normally like ring door bells etc only work on 2.4Ghz but EE and BT hubs can no longer split the SSID so would need to be done manually.
the idea of the smart hub is that it does everything automatically but sometimes it assigns the wrong band to the wrong device.
reboots can help with that issue or disabling the 5Ghz Band temporarily to connect all devices required.
sometimes having the option to connect a certain device to a certain band on a split SSID was useful but if you moved upstairs or something you wouldn’t automatically swap to the fastest band you’d have to do this. It’s swings and around abouts.
rebooting the hub can also effect the chancels it assigned before also, its not very black and white, but loads of troubleshooting steps on the EE Support page and here in the community.
sometimes you could be there for hours trying loads of different work arounds, I normally just turn 5Ghz band off connect all my devices I need on 2.4Ghz then turn back on which takes me about 10-15 minutes instead of 60+ minutes.
also the key to the perfect setup it’s a system reboot every month to clear and locally stored cache and cookies that could be slowing your services down > wish this was more commonly known by customers of all ISPs.
Hope this helps! If you like my reply and want to say thanks for the helpful answer then please click on the Kudos on left hand side also if I answers your question correctly please let us know by clicking on Mark as Accepted Solution
