Repro steps:
1. Open Scene1 from the attached project.
2. Press Play and observe the particles and their trails in the scene view
3. Select the Particle System from the hierarchy, and in the attached Particle Handler script, toggle any one of the IsDead bools (except the #9 one).
4. Observe how along with the particle that was killed, the last particle's trail also disappears
5. Re-enable the disabled particle by toggling the bool back to false
6. Observe the re-enabled particle's trail connecting with the last particle's trail.

Expected result: only the affected particle's trail to disappear and for it to not reconnect with other trails when the same particle is re-enabled.

Notes:
- Not a regression, happens in 2017.1.0p5