V3 Calibrating

Hi.

I'm new to power and enjoying it greatly. Set up on my indoor bike for sufferfest.

Transferred the pedals yesterday for a spin on my road bike.

Put them back on the indoor bike and the figures are miles off.

Have updated the software on the pedal and the app itself.

I now have auto zero on.

I have tried to calibrate through the app (on android) and every time, without fail, it says calibration failed, with no error code.

Helpful advice please

Many thanks

Mark