[solved] tiny slits missing from hair in game

hi, i've made a hair and filled the gaps by using the typical method of extruding the edges. here's how it looks blender (weirdness with the texture, it exported that way, but that's not causing me any problems in game)



however, in game, at the part where i have extruded, three tiny slits of it are missing. (ignore my crazy looking cc-less sim lol)



here is the blend file! thank you!