- Loop start/end markers are belonging to the sequence,
and are common for all (shared) copies of a seq.-part.
- Start markers (triangle marker) are unique for each part, each (shared) copy has its own,
this marker can be set in the note editor, or implicitly by changing part start, or split function.
agreed up to now ?
But what about the following example, where the start marker is right of the loop end marker ?
Look at the resulting part, I do not understand the underlying rule.

And furthermore:
When dragging the left side of the part a little bit to the left,
the start marker jumps to the left of the loop-end-marker and looping becomes effective:


