Coil:
Just to confirm you guys are changing the AP names from a single one to VodafoneXXXX-2G and VodafoneXXX-5G or alike?
As I have found without a segregated AP name it will flick between 2.4 and 5 a lot causing a lot of the issues people describe.
Support for seamless transition has come so far, i'd be surprised to see that really.
2.4G and 5G is often set out by providers simply to draw a clear line in the sand on the standards.