ALP,
In regards to missing traffic, I would open a support case with manufacturer developer team, even if they will not fix it, would be nice for them to clarify to us, that its possible.
To me it looks like technology which they use for message queue, expires messages before all subcribers ack receiving them.
There could be many reasons, from queuing policy to h/w limitations of stratus, why this is happening.
Sorry to drag it like that, it's my professional curiosity, I work with systems like that, in a different industry.