I got some new cycling shoes and had to relearn how to hold my feet in them and put more pressure on the side my big toe is on. For some reason when I got them I was putting pressure on the pedals more with the outside metatarsals. I can only imagine that my other shoes held my feet at a different angle and I just got use to that. Shims of some sort might have fixed the issue too. But a few rides realizing what the issue was and being aware of how I began my pedal stroke quickly solved the issue just by how I held my feet to put power into the pedals.