One of my virtual cameras keeps losing the CM Post Processing script

- Unity Version: Unity 2019 1.7
- Cinemachine & Post Processing are from the package manager, not the Asset Store
- I just did an update to Mac OS Mojave, but this was happening before the update too

I'm creating a trailer for a Unity asset pack and am switching between a bunch of virtual dolly cameras. Most of them have the `Cinemachine Post Processing (Script)` attached.



Each virtual camera is using its own dedicated PP profile.

For some reason, when I click play, I keep losing the script on the cameras.

Here's the error in the Inspector and Console.




Unfortunately, it's not consistent. For example, it happens almost every time on `CM vcam6`, sometimes on `CM vcam 3` and so far never on 1, 2, or 4.

Here are some screenshots of the other scripts attached to the cameras, as well as the timeline, just in case that helps find a solution:




Thanks!