Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.86
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-25 14:34, hash: rBcb10bd379b2d
Short description of error
Selecting a preset for Sampling or Light Paths for cycles render does not update the panel immediately.
It is updated when presets menu is closed.
Captured gif animation is uploaded.
Exact steps for others to reproduce the error
Select Cycles Render.
Select any presets for Sampling or Light Paths.
Paramers are not updatd until the menu is closed.
This is not so serious, but somewhat annoying, since one can not see whether correct preset is selected or not until closing the menu.