Automatic square off open opisition on expiry

I have sold ITC 200 PE last month which was deep OTM on expiry day. But my broker automatically squared off the position on last expiry day.I wanted to expire it worthless but due to squaring off I incurred some premium loss… when I contacted them they told all open options position will be squared off after 12 PM on expiry. Is it normal?

Anyone please help me understand