If you got it from itch, I just updated the store page to allow a download of v1.6.3 again. If you got it from the asset store, please DM me with your invoice number and I'll send the .unitypackage. This is very good debugging info btw, I'll try to figure out what changed between the two versions! The only thing that *should* have changed was the addition of overridden index quads, but that shouldn't be effecting this... sorry for the inconvenience!