Stiff..
Officials can and do screw up enforcements, it's just one of those things.
So, just for your benefit, here are all NFHS LOD situations that can occur. I'll let you look up all those that are auto-first down (there are five as well).
LOD:
- OPI
- Illegal forward pass
- illegal forward handing
- Intentional grounding
- Illegal touching of a forward pass