Sunburn?

Went out to take a look at my plants this afternoon and on this girl I found a bunch of leaves on one side all curled up and crunchy like this. Some discolored, some not, but they were all dry and my first thought was sunburn due to a little residual water on them this morning after last night's rain... Do you agree? Could it be some kind of fungal thing?

Is it all on one stem

I would think dry spot in soil or borer in stem

On a few different stems but only on one side of the plant, I'll look a little closer for borers or other stuff like that though, good call