I've had my Seestar S50 for just under a week and saw an interesting message when trying to go to the star Vega. It told me it could not go there as it was out of tracking range.
I'm going to assume it was because Vega was almost overhead at the time and the Seestar probably has a limitation that the scope cannot rotate to overhead and also has to flip the azimuth 180 degrees to retrack an object once zenith is passed and that would mess up the star orientation for stacking purposes.
What elevations limits are in the software to define what is "out of tracking range" for a visible target? Anything from 85 deg to 90 deg elevation?