Glad you are finding a productive way to deal with cabin fever. I usually end up buying stuff

I use to have the 50 f/1.8. 10% hit rate is unacceptable and would tell me you had a bad lens. My hit rates with the 50 f/1.8 were very good. What drove me to upgrade wasn't the accuracy, but rather the AF speed and the fact that I didn't care for the IQ until ~f/2.5-2.8.