Reproduction steps:
1. Open the user's attached project
2. Open scene "GameScene-Endless-Mode"
3. Enter Play Mode
4. Press J
-- observe crash (reproducible 1/3 times)

Reproducible with: 2019.4.18f1, 2020.2.2f1
Could not test with: 2018.4.31f1, 2021.1.0b3, 2021.2.0a2 (downgrading/updating errors)

Note:
- Not reproducible on Windows from 2020.2.0a20 since case 1264083 was fixed.
- Sometimes instead of the crash, the editor freezes.
- Other times no crash occurs and NullReferenceExceptions are continuously thrown (most often seen in 2019.4). Restarting the project and starting from the beginning a few times would cause the crash to occur.