Power lower in v3.6 firmware?

Has anyone else noticed a considerable drop in the power reported once updated to v3.6 firmware from v3.5? I’m using a Vector 3s.

Im experiencing a 20-30w under reporting compared to what I had on v3.6. This is both indoors and outdoors and based on my heart rate and perceived effort.

Ive checked torque, calibration and crank length - nothing’s changed other than the firmware.

Thanks