Alas, I’m afraid we’re at a true impasse (no doubt because of my own inability to lend much further assistance).
I’ll revive this thread if I come across something useful as my debugging capabilities expand, and in the interim I’ll see if I can find an entirely alternative solution.
John, I truly cannot thank you enough for all of the time you’ve dedicated to this, as well as the undue patience you’ve demonstrated throughout. The entire WordPress community is fortunate to have you.
