Playhead goes past video clip end, but continues to play clip

[eltimbalino]

I opened Openshot via a 13 second video file using Nautilus. I dragged the file from Project Files into my top video track. All others are empty. Deleting all others made no difference. The video sits at the very start of the track.
I click the play button on the viewer.
The playhead passes along the video in the track and shows on the video previewer.
The playhead passes the end of the video in the track before the video has ended, and the video keeps playing while the playhead has no videos under it.
Then the video stops playing.
I can pause the video, slide the play head back and forwards to change what is on the player, and everything behaves as if the video object showing in the track was a longer object. Zooming in and out behaves normally and makes no difference to this curious behaviour.

Okay, I explored some more. I added a clip that was over a minute long. It does the same thing. Then I just moved the playhead to the 3 minute mark, and pressed the marker button. The blue drop on the timeline that it made is 3 seconds to the left of the playhead. The playhead at 5:00:01 leaves a marker at 04:48:08 when the button is clicked.
2:00:00 --> 01:55:06
5:00:01 --> 04:48:08

I closed and restarted Openshot and it still behaves the same.

Email me if you have any questions.

Tim.

Video:
Plays fine in ffplay. I don't have melt.
ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers

  libavcodec 57.107.100 / 57.107.100

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/eltimbalino/Documents/Zoom/2020-03-26 17.21.09 Tim Marsh's Zoom Meeting 694702113/zoom_0.mp4':
  Metadata:
    major_brand : mp42
    minor_version : 0
    compatible_brands: isommp42
    creation_time : 2020-03-26T09:21:52.000000Z
  Duration: 00:00:13.60, start: 0.000000, bitrate: 340 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1054, 285 kb/s, 25 fps, 25 tbr, 30k tbn, 60k tbc (default)
    Metadata:
      creation_time : 2020-03-26T09:21:52.000000Z
      handler_name : H.264/AVC video
      encoder : AVC Coding
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 32000 Hz, mono, fltp, 53 kb/s (default)
    Metadata:
      creation_time : 2020-03-26T09:21:52.000000Z
      handler_name : AAC audio
At least one output file must be spe

Architecture (64 bits or 32 bits) :64 bits
Operating System & version: Ubuntu 18.04 installed software updates today. Haven't opened Openshot for months.
Operating System Installation Method : USB ISO image.
Openshot Installation Method : probably software centre or apt-get install...
Version of Openshot installed : 2.4.1
BZR Revision used (if any) : n/a
MLT/melt version: n/a
FFmpeg (i.e.libavcodec) version : ?? don't know ?? 57.107.100 / 57.107.100
FFmpeg installation : ?? don't know