I suspect the curving might be something like tarnished plant bugs or something similar that injects a substance that causes changes in growth. It's never been proven that the enations are caused by thrips but it's never been disproven either. Do you ever see tarnished plant bugs there?
Edited to add, does that cultivar usually flower normally? There is the odd daylily cultivar that appears to do something similar, assumed to be genetic.
It looks like the yellow with curved buds is right behind the orangey one. Could anything have been sprayed in that location?
