You would probably benefit from the Lantiq VDSL fixes included in the development branch and 22.03 RC4, which are reported to resolve stability issues on vectored lines and other bugs.
See:- Vectoring on Lantiq VRX200 / VR9 - missing callback for sending error samples
Unfortunately, as I mentioned, the BT hub 5 can get stuck in very prolonged boot loops with both at the moment.