Wahoo Slow To Pedal

Hi,

I use Wahoo Kickr Core and Rouvy. During Routes (Not workouts) I find that it is really hard to pedal when going up a hill. The solution, which helps a bit is to drop the reality level.

Last night I noticed that when I was forced to pedal slowly, it would go really slow and then as I did a rotation speed up, just to slow down again.

I have activated ERG power smoothing but haven't tested it out yet if it improves it.

There is no firmware upgrade and I did a spin down like two weeks ago.

Any advice please? Thanks