Weird curve offset behavior

Why, on this curve and this curve only (even after a rebuild), would I get this weird behavior when I try to offset it in the top view?

offset.3dm (35.5 KB)

Using Version 6 SR19

Hi @eobet
Looks like you have your cursor in either the front or side viewport (or perspective, if you eg. have OneView on) and the curve is trying to offset up or down. Move the cursor inside the frame of the top viewport, and it should work as expected - it does here, at least.
HTH, Jakob

That might have been it (although the screenshot was from a maximized top view). I just discovered that if I do InCplane=Yes I get “normal” behavior for that curve as well.