Latest, PreArm: EKF3 not started (internal error 0x8000 1:428 main_loop_stk)

Tried to test motor today and I cannot arm.
FC is pixracer.

Plase provide a dataflash log (use LOG_DISARMED).

Its a bit confusing as the subject here specifies both stable and unstable
versions :slight_smile:

Steps to reproduce would also be good.

I have flying wing, bn-880, compass disabled, nothinf special.
I put model on bench to check motor, try to arm via radio and I saw this error.
Firmwate is latest from today.

Then I have confusing part, I enabled diasmed log and I see error EKF3 or 2 not started. (disabling log didn’t help).
What I have are logs from EKFs not started

And video with original error

Today I tried again, I reinstalled from scratch and same error EKF3 not started.