Sweep1 made naked edge at kink.
Why a new thread on the same topic you started a few minutes ago?
And another duplicate thread here?
It is a different topic since, it is a bug. I made it a different topic to report a bug. And I accidentally made a duplicate because I was confused whether to put it in Serengeti or Grasshopper. Sorry for that.
Can you post the file needed to replicate this?