The PGN standard defines numeric annotation glyphs (NAGs) as a way to represent common annotation symbols in ASCII. The program does not support NAGs and does not handle them as valid PGN. The extension should recognize the glyphs and translate them to their unicode equivalent for display to the reader.
Oh I see now why this wasn't closed. Hmm, I'll need to look into the example further, but I'm not sure the problem is NAGs, or at least not them specifically. I think there's some interaction between them and all the comments and variations that's causing some problems. I'll look into the example and create a subtask when I figure out what the issue is