How to reproduce:
1. Create a new project
2. Open the Package Manager, and install and enable the new Input System
3. Open the "Input Debugger" windows by going to the menu bar: Window > Analysis > Input Debugger
4. In the window expand the "Devices" section and double-click on the keyboard
5. Observe the "a" key's value in the "Keyboard" window while performing the following step
6. Hold down "a" then "Shift", release "a" and then "Shift"

Expected result: The "a" key's value returns to 0
Actual result: The "a" key's value stays 1

Reproducible with: 2019.4.28f1, 2020.3.14f1, 2021.1.13f1, 2021.2.0b3, 2022.1.0a1
Could not test with: 2018.4.35f1 (no "Input System" package listed in the Package Manager)

Notes:
1. Reproducible on Ubuntu 18.04
2. Not reproducible on Windows 7
3. Pressing the key again sets its value back to 0
4. Reproducible only on the new Input System