Powertap g3 hub and garmin 510 lag / slow / delay

Can anyone help please. My power reading seems to have an approx 4 second delay. It didn’t used to and using the same equipment. Garmin and powertap both apparantly on most recent update. Have experimented with turning off 3 second power and now just on ‘power’ and slightly annoying problem persists. Any thoughts please?

Thanks a lot

anyone have any experience with this please?