How to reproduce:
1. Open the project from Edits (GDrive link)
2. Open the "Square" scene
3. Make sure Jobs > Burst > Enable compilation is checked
4. Open the SCRIPT (Edits) with Rider
5. Attach the debugger to Unity
6. Add breakpoints on line 68, 70, 72 and 78
7. Enter Play Mode
8. Once the breakpoint is hit, perform "Continue" (fn + f5) for several times
9. Perform "Step-Over" (fn + f10) for a few times
10. Remove the breakpoints from line 68 and 70
11. Perform "Continue" (fn + f5)
12. If Unity didn't freeze or crash - repeat from step 6 (without leaving Play Mode)
13. When Unity freezes open Activity Manager and filter "Unity"
14. Kill main Unity process and notice how the secondary process stays (May be only secondary process if Unity crashed)

Actual result: Secondary Unity process keeps running after Unity is killed.

Reproducible with: 2020.1.0a20, 2019.3.0f3.