System Information
Operating system: Linux-5.4.10-1-vanilla-x86_64-with-glibc2.17 64 Bits
Graphics card: Mesa DRI Intel(R) HD Graphics 2500 (IVB GT1) Intel Open Source Technology Center 4.2 (Core Profile) Mesa 20.0.4

Blender Version
Broken: version: 2.83 (sub 15), branch: master, commit date: 2020-05-02 11:33, hash: rB1623fdb3bc55
Worked: (newest version of Blender that worked as expected)

Short description of error
Create particle hair, enable children (interpolated or simple). While editing hair in particle edit mode, open N-menu, and enable Tool->Viewport Display->childern to see child particles. Then change particle children clumping curve in ParticleSettings, and notice it does not get updated in viewport. Only after I uncheck and check Tool->Viewport Display->childern again, it gets updated to correspond clumping settings.