How to reproduce:
1. Open the attached project (1235202.zip)
2. Open the Main scene from the Project window
3. Open the "Build Settings" window (File > Build Settings...)
4. In the "Build Settings" enable "Development Build" and build the project
5. Run the build's executable
6. After the splash screen press the M key
7. If the player doesn't crash and is frozen for more than 10 seconds press the mouse on the player window a couple times until another window opens up that the program is not responding. Close the program and repeat steps 5, 6 and 7.

Reproducible with: 2020.1.0a7, 2020.1.0b10, 2020.2.0a12
Not reproducible with 2019.3.14f1, 2020.1.0a6

Notes:
1. Tested on Windows 10 and Ubuntu 18.04
2. On Ubuntu reproduces very rarely
3. Often takes more than 10 tries to reproduce, on Windows 10 after the first crash the build should crash every time