Piping / Sweep1 problem curving

Hi there folks! I’ve got an error that happened to me several times and it is not solved yet. I tested Rhino 7 WIP and Rhino 6.14 that’s why i say it is not corrected yet.
I’ve uploaded an image, video recorded with the action and the Rhino file itself so anyone can find out what’s going on…


If I use the curves for piping around and I got loops on some “corners” rounded. If i use the same curves for Sweep1 with the Circles resulting from the Piping… happens exactly the same… any guess how to solve?

Hello - the corners on the curves are smaller radius than the radius of the pipes - that will generally not work well.