Hi, the current build, 16461 at the moment, does not play all of the final track in the playlist. Playback ends before the last 2 seconds of the track.
Reproduction is quite simple, find a track that has music up the the last second of the track. Highlight the song in Rockbox and do Context Menu -> Playlist -> Insert. You can fast forward to the last 20 seconds or so of the song to avoid having to listen to the entire thing.
You'll notice that the time remaining will say (about) 2 seconds and then the song will abruptly stop.
If this hasn't already been noted then I'll file a bug under flyspray.