Operating system: Linux-5.8.0-7630-generic-x86_64-with-glibc2.32 64 Bits
Graphics card: Quadro RTX 6000/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.32.03
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-06-03 08:27, hash: rB2ae4e860f67c
Worked: (newest version of Blender that worked as expected)
Short description of error
The transformation that the RGB curves node applies to a color differs slightly between Eevee and Cycles, even if the curve is left as default.
Not sure if this is a bug or just a known limitation, but it breaks compatibility between Eevee and Cycles in edge cases.
Exact steps for others to reproduce the error