Very severe Boron deficiency. Too much water will leech B out of the plant and soil. I've seen horribly deformed oil palm bunches and trees because of that as well. Make remedy in yr fertilizer program for the next batch of strawberries.

https://agriculture.borax.com/crop-guides/f...rops/strawberry

then u know the cause and what u have to do.

out of curiosity, u do manual pollination or leave it to mother nature?