VLC thinks chapters in mp4 files are subtitles
Windows 3.0.12, Android 3.3.4
With any MP4 file that has a chapter stream, VLC will show it as an available subtitle stream (e.g., Track 1 - English). When that subtitle is enabled, VLC will immediately display the start timecode for the current chapter as if it were a subtitle. Seeking forward or backward causes this subtitle to vanish. Reaching the next or previous chapter marker by any method will cause the timecode for that chapter to appear. Seeking with the seek bar does not cause reemergence.
VLC has seems to have no such issue with MKV files with chapters.