Direction of stepper motor changes between startrups

Hi all,
I have a configuration for tests. To keep it simple I setup 1 axis only for now.
After startup of LinuxCNC the direction of the stepper is not always the same. Sometimes the "+" and "-" are changed. The direction remains that way until a next startup or even several startups.
What is wrong with my setup or what could cause this direction swaps?

Because I setup the X-axis only, I attached the config part for that only.

Regards, Hans

Check the motor wiring to drive.
Check for loose connections on the drive connectors.
What drive?
What interface?

tommylight wrote:

Check the motor wiring to drive.
Check for loose connections on the drive connectors.
What drive?
What interface?
 

Hy tommylight,
thanks for Your time, but I could narrow down the problem to the controller. I use Novosun EC500 with the Remora firmware.
controller:
www.aliexpress.com/item/1005002253809296.html
Firmware:
github.com/scottalford75/Remora-RT1052-cpp

I connected an LED to the direction output and this LED sometimes blinks when the motor doesn't move. This is probably part of the problem.
I will ask this question again in a thread specific for the Remora firmware.

Thanks again for Your answer!

Regards, Hans