System Information
Operating system: Linux-5.8.0-7630-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 455.38

Blender Version
Broken: version: 2.92
Worked: -

Short description of error
The default values for curve edit mode are all 0 when opening a file from an earlier version.

Exact steps for others to reproduce the error

1. Open the 2D template in Blender 2.91 and draw a simple stroke.
2. Save the file.
3. Open the file in 2.92 or later.
4. Go to edit mode and expand the Curve Editing panel -> all values are zero.