Hi Anis, I have made a change for the next v2 beta for this.

Previously, MoI would leave 3 point arcs alone only if they were smaller arcs of 40 degrees or less.

With the next beta it will leave any 3 point arc alone (not replace its control points by a deformable cubic version) regardless of the angle of the arc.

So the next beta should behave like you expected for this case.

- Michael