Not sure what you have checked so far but is there anything that stands out in the logs?
The initial replication should take some time but after that its just delta changes so unless you have alot of data change, it should be a relatively fast replication
Thanks for the feedback. I will take a look at those VR logs and see it I can find some clue.
Interesting is that it only happened to certain VM. The rest are working as expected.
I will provide further update.