Here’s what happened:
The owner of the property needed to do some work, and decided to do it on Shabbos. Being that the owner isn’t Jewish, that’s not a problem (the restaurant rents the space.) The issue was that the workers were given access to the restaurant and its kitchen, and were completely unsupervised.
The OK told the owners of Basil that this was an issue, as the workers could have used ovens to heat their lunches. There are cameras in the kitchen, so they requested the video footage from the property owner. They asked Basil to remain closed until they reviewed the video. Basil didn’t want to miss any days, so they opened against the OK’s wishes. Therefore, the OK pulled the hechsher.
Or so I was told by someone “in the business”.