I have this exact same problem everytime.
I make small molds for fishing lures and the collision happens at the end of the hook. everymold has a different hook, not the same file, but drawn the same way. the hook is drawn using a spline and then doing a sweep of the profile,
this is only a 2 axsis profile cut.
I have looked at top of part, top, of feature. I have looked at the tool overall length, protrusion length.
while there is no problem when machining this, I would like to fix it,
the error message is always always the same.