System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.92

Blender Version
Broken: version: 2.90 (sub 0), branch: master, commit date: 2020-05-01 21:55, hash: rB83304e4c221b
Worked: (newest version of Blender that worked as expected)

Short description of error
Grid Fill - Offset doesn't work

Exact steps for others to reproduce the error
Apply Grid Fill
Try to change the Offset parameter - nothing happens