Thanks for the care. Still no luck. I feel like the reflow isn't refreshed in InDesign Server. I am going to do some test to see if it's related to the server or the fact the story is xml content.
Well with sample docs, both pure string import and xml import fire the reflow process in IDS 2015.
The client server is CS6 but I am not sure how that could be related. Sighh
I think it's probably how the template has been prepared.