How to reproduce:
1. Open the attached project "GameViewInputTest.zip"
2. Enter Play Mode
3. Undock the Game view window
4. Press and release the left mouse button on the Game view window header
Expected results: "Action Is Pressed:" returns false
Actual results: "Action Is Pressed:" returns true
Looking at the Input Debugger we the leftMouseButton value stays at '1' even after releasing the mouse button during step 4.
Reproducible with: 1.3.0 (2020.3.37f1), 1.4.1 (2020.3.37f1, 2021.3.8f1, 2022.1.13f1, 2022.2.0b4, 2023.1.0a5)
Reproducible on: Windows 10 & 11
Not reproducible on: MacOS 12.6