

Is it normal for flight attendants to unlock lavatory without warning while it is in use?
On my last flight I (f) went to use the lavatory while the seat belt sign was not turned on. I was in there for maybe 3 minutes, all of a sudden the slight turned off and on and then the door flew open before I could say anything or grab at the door. There was another female passenger looking and me and a male flight attendant on the other side of the door. I don’t even remember if I said anything I was in shock. Then he looked in and said sorry and closed the door.
I washed my hands and when I came out he said “I’m sorry,” and then said, “you should have locked the door.” I told him “I did lock the door!” And then a female flight attendant who saw me enter the lavatory said, “no, she did everything perfectly. She did lock the door.” She turned to me and apologized she said, “it was like watching a car wreck I tried to stop it but it was too fast.”.
I was so embarrassed I went back to my seat and didn’t say anything else. I later tried to submit a claim to customer care but they have been shrugging off my concerns and won’t tell me what the policy or procedure is for flight attendants unlocking lavatories. I would expect a knock or a verbal “anyone in there?” Before a flight attendant unlocks and opens the door. It wasn’t even for an emergency or anything. I’m very confused by the whole thing and upset the flight attendant tried to blame me right away.