BT equipment sucks
Sorry, but all of their kit just sucks.
Remember they were boasting about how the Hub 6 was so much better than Hub 5? Here's the kicker I was given both business hubs and in terms of configuration features the Hub 6 lacked significantly in comparison to 5.
For example, on Hub 5 you could configure your own network range 192.168.x.x 10.x etc.
However Hub 6 this was limited you could set to to 10.0.1.x for example, but click apply and it would hang and revert to 192.168.1.x. They later said this was intentional due to some BT infra uses the 10.x range so they had to disable it. I called BS, and say it's a broken feature (considering the 10.x range is still shown as an option. Just doesn't work)
Static IP management was a mess also compared to 5, the new UI was sluggisb compared to 5 (which is already slow) and looked terrible.
But then there are limits compare from Home Hub to Biz Hub too!
A business hub 5 will activate and use IPv6, a home hub 5 will report IPv6 is not available. On the exact same connection.
Put bluntly BT kit sucks, if you need to build a network of some sort, go buy some proper kit don't bother with BTs stuff because it only gets worse with each generation.