Hi,
that's odd, I am not aware of any changes on that front within Photon nor PlayMaker integration ( all is handled within photon for network destroy).
I just doubled check here, and the demo is working fine, I have both instance running, if I hard quit one, the other doesn't fire any error, all expected events are fired, master is switched properly, etc etc.
Could you actually be in a situation where the photon version is not the same? like you are running two instances of different versions?
Bye,
Jean