Reproduction steps:
1. Open the user's attached "Demonstration" project
2. Open Assets/Scenes/SampleScene
3. Enter Play Mode
4. Press the Left Shift Key
5. Without releasing the Left Shift Key, click outside the Game View window
6. Without releasing the Left Shift Key, click inside the Game View window
7. Release the Left Shift Key

Expected result: On Left Shift Key release nothing gets printed out in the console window
Actual result: On Left Shift Key release "Pressed" gets printed in the console window

Reproducible with: 1.0.0 (2019.4.15f1), 1.1.0-preview.1 (2020.1.14f1), 1.1.0-preview.2 (2020.2.0b12, 2021.1.0a6)
Can't test: 2018.4 (package version too old)

Note:
- Seems to only be reproducible on Mac
- The issue is only reproducible with special keys that have 2 buttons on a keyboard (Left/Right Shift, Left/Right Ctrl)