System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 452.06

Blender Version
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-09-16 21:05, hash: rB27660b3cd90d
Worked: (newest version of Blender that worked as expected)

Short description of error
Geometry explodes on the bezier curve when using the new Bevel Profile feature and increasing the Resolution in another Bevel Mode by switching back and forth. Adjusting the Resolution with Bevel Profile active removes the bug.

Exact steps for others to reproduce the error

1. Draw a bezier curve of any size.
2. Add Bevel to the curve. Go into Bevel Profile and pick a bevel type or make your own.
3. Switch to Round and increase the Resolution number.
4. Go back to Bevel Profile. The bug should appear now.
5. Adjust the Resolution again, which should make the bug disappear.