I had the same experience.
https://forum.atherenergy.com/t/charging-at-ather-grid/292/332?u=nit1995
I was waiting for over an hour in front of a fully charged vehicle and someone came in rented Ather (Royal Brothers or something). He was also fully out of charge. I told him very confidently that you cannot charge and you will have to wait till the other guy comes. He still went ahead and pulled it out. It wasn’t locked or anything. I thought that it was maybe an error. I didn’t want to pull it out from my scooter for the fear of damaging the port or the charger.
While the ability to pull out the charger might be helpful in case someone is hogging the place, I won’t be confident of putting my scooter to charge when someone could easily remove it.
This was at Innov8 Koramangala.