There are no acorns at all along the central east coast. There are multiple species of oak in the region.
My first response was: send in the scientists! Is it a disease? Climate change? Let’s figure it out, and then fix it! Resistant cultivars, temperature independent flowering mutants, it takes oak trees a long time to grow, so we need to get moving. However, my personal ecology contact tells me a more proper response is to wait and see what happens next year, if it does, then we can try to figure out what’s causing it.