System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 456.71

Blender Version
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-03-30 21:09, hash: rB87aa514611b9
Worked: (newest version of Blender that worked as expected)

Short description of error
I can't save Preferences by pressing bottom,while I resize Preferences window]

Exact steps for others to reproduce the error
[Open Edit-Preferences-And press button left and bottom. Then resize window and press it again]
[Based on the default startup]