Reference system sometimes goes out of alignment during taxi after start-up?

[Althar93]

Hey all, 

I am not sure if this is a bug, intended behaviour and/or just me doing something wrong, but after completing alignment of the reference system after start-up, and witnessing the warning light extinguish, and I will turn my HUD on and verify everything is lined up with the horizon.

I will then start to taxi and sometimes (maybe 1/10 times), after turning, the reference will tilt itself to the side and stay that way. I can easily fix this by turning down the reference system, waiting for a minute and running it again but I find this curious.

Has anyone else been experiencing this behaviour? 

Cheers,