cosmetic thread display error in drawing

Hi,

I'm creating my own standard parts for some reasons - so far so good.

Now if i insert a screw with a cosmetic thread into a drawing the following happens: (i´m on SWX2015 SP5)

When High Quality is checked the thread wich is supposed to end on about 0.5 mm before gets extended.

with draft quality checked verything is fine:

This is driving me crazy - i got no idea where this is comming from and i can`t even replicate it on a new part.

Anyone got ideas on this?

BR

Alex