As it turns out, the critical mistake I was making was that I had my OBJECTID variable typed as a string. This makes me wonder if it is actually possible to edit a hidden attribute as I had tried to do in my previous post which I referenced earlier in this thread.
Once I finalize and deliver the project that I am working on, I will go back and test to see if you can actually update a hidden field or not. I will report back on the referenced post.
Thanks, Tyler