**System Information**
Operating system: Windows 11
Graphics card: NVIDIA GeForce RTX 2070 SUPER
**Blender Version**
Broken: 3.3.0
Worked: None
**Short description of error**
Nurbs curve goes sharp when a point get copied and extruded
**Exact steps for others to reproduce the error**
1. Make a new nurbs curve object.
2. Go into the edit mode and duplicate any point.
3. Try extruding that point.
4. The curve goes sharp, and although it looks simlar to polyline, corners are a bit rounded. However it doesn't look like a smooth nurbs curve at all.
5. Trying to set spline type to nurbs again doesn't solve anything.
{F13562284}