I took the example snippet and cleaned things up a bit, adding some crude timestamping and commentary.  (Attached)

In the example, when the Process finally dies, a lot of information has been put onto the Queue but it hasn't necessarily had enough time to be synced to the parent process so it may be only a truncated subset of the data that remains available/visible/retrievable on the parent.  How much data gets synced to the parent depends on many factors and should even vary from one run to another.

That is to say that a multiprocessing.Queue is not going to hold up a dying process to finish communicating data to other processes.