OK, I tried updating to Playmaker 1.9.0.p5 but that did not help.
It is also not mentioned in the release notes, so this is OK, nothing unexpected.
Reproduction steps:
1. create game object, add FSM, add an action and create/set some transition events,
good: these new events appear in the events tab of the FSM.
2. select the state with the events and copy it, create a new game object add an FSM and paste the state:
Expected: the transition events show up in the events tab of the new FSM.
BUG: they don't.