Even with the previous commits, there still exist race conditions in
which if the Cyclone DDS implementation receives the initial HEARTBEAT
after the message has been sent, it is silently dropped (Volatile behaviour).
And since the Cyclone DDS implementation is ignoring HEARTBEATs of
yet unmatched endpoints (which is what happens to our init HEARTBEAT),
the best way to counter this is to just wait after the reception of the
first Cyclone DDS message (which signifies that it has matched all our
endpoints) until the HEARTBEAT timeout has also sent the respective
initial HEARTBEATs.