Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 451.67
Broken: version: 2.83.5, branch: master, commit date: 2020-08-19 06:07, hash: rBc2b144df395f
Short description of error
Output switching in Separate XYZ node fails to update Displacement without going in and out of edit mode.
Exact steps for others to reproduce the error
Open attached .blend file and change output of the Separate XYZ node from X to Y to Z, etc.. (It might update once or twice but will stop updating after).
You will notice the geometry is not changing slope direction. Press Tab to see what geometry should look like.