Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.59
Broken: version: 2.83 (sub 13), branch: master, commit date: 2020-04-16 15:38, hash: `rB8cb10c124efe`
**Short description of error**
When I change texture, that influence to density, hair do not update automatically and I forced to refresh it manually.
situation with particles is worse: after rechecking influence, it become disabled (for viewport)
**Steps to redo**
paint the hair & observe that it doesn't change.
One has to change property slider to update it, or toggle the checkbox.