The horizon is off. (roll) indicates one wing is low by 10-20 degrees.
Pitch is OK, airspeed is perfect, compass and headings are fine
Altimeter is perfect, all verified by backup analogue dials, it just indicates it is flying one wing down by a large amount.
reads fine when stationary on the ground, when flying indicates one wing low.
Returns to correct level attitude when stationery on the ground
Its brand new and just started its test flying stage.
Best wishes
Glen