Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 418.81
Broken: version: 2.80 (sub 50), branch: master, commit date: 2019-03-18 21:39, hash: rBd47f827019f2
Also broken in other versions a couple of days older at least.
Also broken on 2.79 in builder.blender.org (version: 2.79 (sub 7), branch: blender2.7, commit date: 2019-03-14 17:29, hash: 57b5852bc8b8)
Worked: works well on 2.79 stable (version: 2.79 (sub 0), branch: master, commit date: 2018-03-22 14:10, hash: f4dc9f9d68b)
Short description of error
Bevel weight not decreasing bevel smoothly as value decreases when two consecutive edges are being beveled.
Exact steps for others to reproduce the error
Create a look with 2 consecutive edges being affectd by bevel weight, one as a value of 1 and the other change the value with the slider.
if you do that with a bevel modifier, the bevel effect on the mesh will not change smoothly on the geometry.
If you do the same on 2.79 it works very well and smoothly.
I attached a video with a sample of the same function, how it works in 2.79 and in 2.8.
This works almost similarly with percentage method and works well, but I really need it to work with a specific value instead of a percentage, on a specific project.