Private Use Characters past E6FF are replaced with box characters even with a modified glyph_sizes.bin.

Private Use Characters past E6FF are replaced with box characters even with a modified glyph_sizes.bin, I am not sure why. The Private Use Characters before E700 work correctly, but for some reason, even with a proper texture for the unicode_page_e7, the ones in the page ends up being replaced with a box character.