fixed: Sketch used for extrude cut going crazy after unfold

Hello,

I am going slightly mad repeating a process here.

I bring in an .dxf sketch of a pattern then extrude it. Works fine.

However, after I switch to the flat pattern config the drawing goes crazy, as shown below

not sudden cut-extrude loss

below is what happens to the sketch. I'm not sure what to call the "spaghettifying" process

Any idea what is causing the sketch to behave like this? What can I do about it.

I'v encountered this a few times before, but all those times the error was outside the panel area so I just deleted them.

Thanks

David

SolidworksParts And Features