@Mar Welcome to the community 
there’s an unknown issue with our elastic backend side which make our elastic slowdown, that seems make our pump not pumping to hybrid too, so basically our pump stuck pumping into elastic before pumping into hybrid because of elastic bottleneck that cause to much analytics lost.
is this suppose to be the expected behaviour ?
The issue sounds like a similar issue with Kafka on this thread.
is there a workaround that make our pump still pumping to hybrid to even when our elastic is slowingdown vice versa ?
You would need to set up a pump timeout. The timeout ensures there isn’t severe interruptions pump instance when purging records to to the elastic search data sink.