B737-700
Communication Breakdown
Deviation / Discrepancy - Procedural Security; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown
Flight Crew Overcame Equipment Problem
Procedure; Company Policy
Captain came out for lav break. I went in to the cockpit. First Officer said he was going to do the same but there was a delay in him coming out. Once he came out; not sure how door got closed but it did. Immediately Captain called and said she was reopening the door so I could come in.
A Boeing 737 Flight Attendant reported the cockpit door closed before she could get in to relieve the First Officer for a lav break.