I can confirm, that I experienced the same issue: Mount not stopping on moving to the next position in polar alignement.
I also remember having that issue quite a while ago and then it was fixed for a while. But currently (latest up to date Astroberry) it is again present.
I am anyway desperately waiting for a new stable release to have this bloody OnStep issue (crash on unpark) fixed.
INDI/EKOS/Kstars is great, but sometimes drives me nuts!