How to reproduce:
1. Create and open a new project
2. In the title bar, navigate to Window > Analysis > Input Debugger
3. Expand the “Devices” item
4. Double click on “Mouse” to open Device information window
5. Press and hold mouse forward key
6. Observe the Device information window

Expected result: The value of backButton is 0 and value of forwardButton is 1
Actual result: The value of backButton is 1 and value of forwardButton is 0

Reproducible with: 6000.2.0a2, 6000.2.0b1
Not reproducible with: 2022.3.62f1, 6000.0.49f1, 6000.1.3f1, 6000.2.0a1

Reproducible on: Windows 11
Not reproducible on: No other environments tested

Notes:
- The reverse happens when holding mouse backward button, backButton and forwardButton values are swapped, 0 and 1 respectively
- Downgrading/upgrading Input System package has no effect on this issue