Answered
win10+ classic 5.0.580-d
when i make a tools of locus which is based on point on sgment.
use the took, i got extra segment.
another example:
The same question 
win10+ classic 5.0.580-d
when i make a tools of locus which is based on point on sgment.
use the took, i got extra segment.
another example:
Point on Path in custom tools is not supported.
See the first note in the manual.
Expanded answer
Expanded++
(complete workaround, for a user it is like a custom tool)
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