There's a lot of research and anecdotal evidence that ng insertions really interfere with sensory aversions. I don't know if that's why your little one has issues.
I have told DD's doctors that I would go ahead with a button over an ng again.
Sorry. .. I'm probably not being helpful but I know that ng tubes can be problematic with eating/drinking.
We've always had trouble with DD when she's had ng tube feeds.