Interesting observation! Good find!

In my case, when using the Mount Control from KStars/EKOS, the mount crosses the northern meridian (below Polaris) without any issues in both directions. No crashes nor interruptions.

But the behaviour of the arrow key is inverted! Meaning, I can use and hold the left button to cross the northern meridian, when I let go and press again, the mount goes in opposite direction, that is towards the meridian again. Very weird. Not sure if this is a feature or a bug ?!

I am using KStars (v3.5.9) from my MacBookPro and connect to the indiserver of the StarGO2 remotely.