System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15

Blender Version
Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: rB0759f671ce1f
Worked: (newest version of Blender that worked as expected)

Short description of error
This can be seen at the Transform node in Geometry Nodes or Mapping node in Shader Editor (maybe there is somewhere else).
Initially, their Scale parameter is always set to 1, but when you click Backspace, it returns to 0. Sometimes it's confusing.

Exact steps for others to reproduce the error

1. Add any Mesh.
2. Open Geometry Nodes Editor and press New button.
3. Add Transform node
4. Hover mouse over above its Scale attribute and press Backspace.