I could reproduce your strange behavior.
After OnStep ColdStart and if Telescope was Parked I receive the Status "nNPH" which is At Home and Parked.
I checked OnStep response on :GR# and :GD# and effectively the coordinates are wrong RA=0 DE=0
After unparking whatver I do it in a terminal or from Kstars I get the right Parking RA/DE
So it is definitively not related to the driver.
Have a try to connect with my driver after OnStep Coldstart