How to reproduce:
1. Open "case_1156836.zip" project
2. In Project Window select SampleScene
3. In Hierarchy Window select "Example" GameObject > put a tick on Example (Script) Component
4. Play the Scene
5. When " Done" appears in Console Window - Pause the Scene
6. Open Profiler Window and put the marker in Profiler on the Frame which was logged out in Console
7. Extend Job section in Profilers Timeline > go further with one Frame (as in attached "Further Frame.png")

Expected result: All Workers Jobs are shown in the Timeline
Actual result: Worker that takes 6 or more physics Frames to complete its Job is not shown in the Timeline

Reproducible with: 2017.4.27f1, 2018.4.1f1, 2019.1.3f1, 2019.2.0b4, 2019.3.0a3

Notes:
If Scene is played with Script already enabled, it does not show the real problem
It can take more than one time to see the problem