Hi,

There is a bug in lmt_arrow. If given a "non-cycle" path, lmt_arrow completes the cycle. 

    \starttext

    \startMPcode
      newpath p;
      ahfactor := 5;
      p := origin .. (1cm, 1cm) .. (2cm, 0);
      draw lmt_arrow
           [
             path = p, 
             location = "percentage",
             percentage = 50,
             alternative = "curved", 
           ]
           withpen pencircle scaled 1bp;
    \stopMPcode
    \stoptext

With 2021.11.11, I get the attached file. Note that lmt_arrow has drawn the "cycle" version of the path, even though p does not have a cycle.

I have looked at the code and cannot figure out why this is happening.

Thanks,
Aditya