Operating system: Linux-4.15.0-46-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 1080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 418.56
Broken: version: 2.80 (sub 51), branch: blender2.7, commit date: 2019-03-25 23:15, hash: rBadfdae3fc2f4
Short description of error
When you check and uncheck the Harden Normals checkbox it alters the mesh slightly and doesn't have two states, but rather three or more, as you keep clicking on the checkbox.
And when you change the width of the bevel it wiggles.
But may be it's a minor tradeoff of the new bevel algorithm, I don't know.
Exact steps for others to reproduce the error
Open the file. Click multiple times on the checkbox