Please read this document about mentioning: @Mention Etiquette Guide . It hasn't even been a full day yet and I can think of some others who are more knowledgeable than I (which does include Jeff ).
I reply to posts that I feel I can contribute to when my time is available -- the forums are predominantly 'patrolled' by volunteers. Being the only person who is administering/testing/documenting our entire Tableau environment (Server, Desktop, Reader and possibly Prep) for production, QA (2018.3 testing), and 2019.1 beta, plus being the administrator for Alation, and any other duties my manager assigns (I'm his "go to" person) can limit my contributions in the forums at times.
Regarding this particular issue, I have no idea However, I do look forward to the solution you come up with when you post it here
I am really sorry for the trouble caused by me.
No trouble, just letting you know why some questions don't always get an immediate response. The forums are more like pre-support, that step one takes before contacting official Tableau Support No worries