Steps to reproduce:
1. open ExampleProject
2. open scene "test"
3. select object "Emission MIN=0 / MAX=15" from the Hierarchy and Simulate Particle Effect. Notice: no particles appear.
4. select object "Emission MIN=0 / MAX=16" from the Hierarchy and Simulate Particle Effect. Notice: particles appear.

Expected behavior: Particles appear on both simulations.
Actual result: Particles don't appear when Emission Burst Min is 0 and Max is less than 16.

Reproduced with: 5.5.0a6, 5.4.0p2, 5.3.6p2, 5.2.5f1.

Note:
-the only difference between two objects is in Emission settings.
-Particle System seems to work as expected when in Emission settings Burst is set to MIN > 0 or MAX >=16.