Projection 2D bug?

Meshing a prism with 2 parts, I have meshed the internally cutting triangle. The top and bottom triangle have been meshed by projection 2D, with this cut as the source face. The volume hypothesis is 3D-extrusion.

When changing the parameters of the center triangle, one of the others doesn adapt itself when meshing, and generates a "meshes on faces ... seem different"-error. Reassigning the (same) center triangle again solves the problem, until the parameters of the center triangle are changed again.

Hope you can fix this!

Kind regards,

Jelle