PC Bakerloo / Harold & Wealdstone People Get Off Platform Onto Tracks

Issue: At Harold & Wealdstone Platform 1 approaching from over ground end heading towards London while stopped in the platform passengers stepped down from Platform 1 and onto the tracks then vanished. Not sure if they boarded the train via closed doors or did the ascension deletion.
Where: North Wembley Platform 2
Train: 1938
Timetable: Chapter 3 Past Duties Journey 201D-02
Reproduction: Drive service - doesn't always happen so there is some randomness to it
Video: forward to time 33.00 to 33.12 to see the issue