[This case was test in Unreal Blueprint, with Wwise 2019.1.1.6977]
Post Event by event name does not seems to work and is not triggering the specific event. On the other hand, by selecting the parameter Ak Event instead of writing the Event Name, the event is playing.
But, if I have a Post Event with an Ak Event selected in my blueprint, no matter where it is or if it is even connected to any other node, then the Post Event by event name will be working.
Here is an example
node 1 is working , but node 2 is not (ignore the fact that the node 1 is not link). BUT if I call 1 somewhere in my blueprint, then 2 will work
Not sure if it is a bug or if I'm missing something