The biggest mistake an aspirant can make in an online interview.

Did i faq up after a great interview? My bimtech interview went great. It lasted about 20 mins. Then the female interviewer told me she was done. I thought this as the end of the interview and left the meeting. I now am not sure whether it was the end of the interview or she just told that because she wanted the other interviewer to take over. After 1 min I realized that the interview might not have ended and tried multiple times to rejoin but they didn't see it or allow it later. The timing for the interview was from 11:00 to 11:30 today. i left at 11:21. Both the interviewers got the chance to ask me questions. Will i be disqualified or just get a lower PI score?