Creo slots flipping when dragged

Hello,

I'm trying to set up a link mechanism using slotted connections.

The link is following the curve, however it will randomly flip 180 degrees when dragged.

http://vvcap.com/0LdTRYLooHa‌‌

I need the holes to always be on the outside face.

PTCs support article on this issue said about putting a third general constraint with the centre planes parallel, but still have the exact same problem after doing this.