(I've given up with the VM font.. apologies for non-EVA users)
Though if all cases are EVA eeeb or eeb (and word end) to me it shows the link with EVA iiin/iin, but that's not to say you are not right, I just don't think it was ever intended to be "n"
I think there's lower hanging fruit for unsureness on scribe or retracer's part, such as below from f115v. To me there's no where this swish can go and still make a grammatically correct (by usual preference) word. It's also unclear if it was intended to be an "n" with an "o" in the way, or "r" and they put it in the wrong place. Obviously 1 example can be explained away in various ways but I could pull 10 examples each page from the "recipes" section that don't really make much sense. On this same page there's a word that starts with "i" and a backwards "e" shape to start a bench, fully looped "r" like a capital "P", black (actually black) ink splodge above the top star and in the same ink (to my eye) a "retracing" of "r".
I do think there's some additions to the text, and various levels of understanding of how this whole thing works from different scribes (or maybe one with different states..) but I also think the text made no sense to any observer at anytime (yet) and so I don't think meaning was lost by these sorts of additions or such that these things turned something that once made sense into something that does not now, at least from what I know so far