seedling trouble

Don't have a camera atm but my blue mystic seedling sprouted great, and 2 leaves looked great and 2 more little guys popped up, then this morning one of the first leaves is bent almost in half. Any ideas? Its in a small cardboard planter cup and I water it once a day after it dries out…

i dont understand, did you bend it accidentally , or it bent on its own?

It just started sharply bending overnight, I didn't touch it. The little rounded flaps that the leaves sprouted away from are yellowing and curling back too