Hi John,
thanks for your quick and comprehensive reply.
I did search but didn’t find anything.
For me, I’ll stick with unintuitive, verging on a bug in the case where I actually deleted the contents of a field on a page and then hid that field by unchecking a conditional checkbox. I would expect that physical act of deleting to be carried over. (As distinct from if I just checked/unchecked a conditional field, I would expect the fields & data it shows would not be affected.)
Good to know about save_post_action also, thanks.
