Watts low

Something strange is happening. I use a Tacx Vortex smart. When I am in the “pair” screen the watts on my trainer are within 5-10 watts of my power meter. But as soon as I ride within the Zwift world the output on the screen is consistently 30 watts lower than my power meter. This happens on inclines, declines, and flats. Thoughts?

You can check for firmware upgrades and also calibrate your trainer.

my watts are stuck at 58-60 and that feels completely wrong.