Greetings,
I was hoping that someone might look at
opac detail scripts do not respect MARC tag
visibility
The differences in what appears
between Normal View and Marc View (and potentially ISBD view) differs even if
some things are marked as not visible.
It’s too late for 3.18, but it would be great to get a sign
off. I just rebased it. There is a pretty good test
plan that should be easy enough to follow. 
GPML,
Mark Tompsett