As it says in the title when I come to render my scene, the hair system just stops working and looks nothing like the material preview or viewport render.
Not really sure whats causing it, I have another patch of grass in a pot and that works fine, and I can't seem to see any difference in settings.
The only thing I could find it when I turned off children there was no hair at all, the parents didn't render. Also, when I turn on virtual parents it seems to work but with very few hairs and odd shape, so it doesn't fix the problem at all.
I am quite new to particle systems so there could be an incredibly simple fix that I am missing.
Here's the file: