Yeah, it's either weird or it doesn't like me. I cant get it to apply the same enchant to another piece of armor, and it also won't upgrade the enchant level on the one I have.....
This is the first refining information I have ever seen on the CME issue, though I am dubious that it is the cause in all cases.
Now that you mention it, I only really started having the problem a lot on my last map after I built my tree. It'd happened a time or two beforehand (mostly in the dimension), but never to the frequency it did post-tree. Huh.