LED lights are different since upgrading to APM:Plane 3.3

Hello everyone,

Since we upgraded our Skywalker (originally 3DR Aero until we replaced the fuselage) to APM:Plane 3.3 the external LED light blinks in yellow (this previously indicated a hardware failure). However when connecting it to Mission Planner there is no error message pointing us on what might be failing.

Despite the yellow light, it’s possible to press the failsafe button and arm the plane, then the light turns fixed blue if there is no GPS fix or green if there is.

We’ve tried downgrading to 3.2 and that does not happen. The light goes blue directly.

What can be going on?

Thanks very much,