iPad link not ERG-ing

Hi there, I have just tried to use zwift on iPad. All looks good.
All paired successfully with Tacx Neo and HRM.
Workouts shared from mac laptop automatically
Only problem is that although the ERG says it is on the trainer is not responding.
eg when the power is a 150W the trainer doesn’t respond to Zwift and it feels like I’m doing a free ride.
On the workout it says that ERG is on and when I stop Zwift says that ERG is disabled.
Hopefully this makes sense to somebody
Any ideas on why this is?

Hey Buu RCC, can you try restarting Zwift and pairing your trainer but don’t pair your HRM yet? Then once you start the ride go into Menu and pair your HRM. Can you let me know if that makes a difference at all?