Okay, I don't know what the heck is going on, but I'm glad I
finally managed to find a way to post the revised version of the previous chapter of fanfic. Somehow, when I tried to edit the original post, it
completely erased the
entire post!

I literally had to go through many trial-and-error efforts (I've lost count how many times I ended up editing that post) before I found out that something in the first third of the revised chapter was the source of the problem. I went through many more countless edits and failed to find a specific part of that section that might be causing the problems.

I eventually gave up on the original post and just tried to put it all in a new post. It didn't work.

Finally, I decided to put everything but the affected chunk back in the original post, then put just the affected chunk in the new post. Finally,
FINALLY!!!, I have every part of the revised chapter on the topic of my fanfic. The only problem is that it's now out of chronological order, but I'm sure anyone who reads it will be able to figure out how it should go.
Now if you'll excuse me, I gonna go burn off the stress I accumulated in trying to finally solve this problem.
