How to reproduce:
1. Open the attached “IN-29317.zip” project
2. Open the Player Settings (Edit → Project Settings → Player)
3. Set the Fullscreen Mode setting to Windowed in the “Resolution and Presentation” section
4. Build the project with the “SampleScene” Scene added
5. Open any other application and place it next to the Player window
6. Focus the opened application and try to hover over the UI elements visible in the Build

Expected result: The Hover function does not get triggered
Actual result: The Hover function is triggered

Reproducible with: 1.1.1 (2020.3.46f1), 1.5.0 (2020.3.46f1, 2021.3.20f1, 2022.2.9f1, 2023.1.0b7, 2023.2.0a5), 1.8.3 (6000.0.3f1)
Not reproducible with: 1.0.2 (2020.3.46f1)

Reproducible on: Windows 11
Not reproducible on: macOS Ventura 13.1 (Intel)

Notes:
- “Reset And Disable Non-Background Devices” setting should prevent this issue from happening, but it does not
- To verify the regressed version, build the project in new folders for every build
- Only reproducible in Standalone Builds