I recently worked on a mazda 2.3L. The crankshaft sensor tone wheel was part of the pulley, and the pulley was not keyed, making it very easy to get the tone wheel out of time. I removed it to reseal the front cover and had to be very careful to keep the indexing the same on the pulley so the crankshaft tone wheel would still be in the proper place. I’m betting the crankshaft pulley bolt came loose and allowed the pulley and tone wheel get get out of time.
You’re fine. I tracked my car six times this year. 100 laps of the absolute hardest braking you could imagine from 110mph, and the brakes look just like the day I installed them. My tires though, that’s a different story. You’re fine.