Looping commands in modules cause playback bar to jump around

[mankeli]

For example at 05:00 in this mod.

[mmontag]

I think this is a quirk of libxmp (underlying library).

It does not report a monotonically increasing playback position, but exposes only the raw xmp_frame_info.time https://github.com/libxmp/libxmp/blob/master/include/xmp.h#L326.
Similarly, I don't think the reported duration takes loops into account. It is only an estimate.
Would prefer not to patch libxmp, so this is how it will remain for now.

https://github.com/libxmp/libxmp/blob/f56472b117c592e3056a8d89aae847496df7dfac/docs/tracker_notes.txt#L218