Just this, really. I had a horrible experience one of the times I had covid when I had started to lose my sense of smell and taste before I even realised I was ill, and chocolate was absolutely disgusting. I couldn't taste any of the sweetness but could still taste the other elements, so it was just bitter, oily and horrible. Boak. Now, some years on, I just don't like it anymore. I've lost my sweet tooth generally and the thought and taste of chocolate is fairly off-putting. I keep trying to like it again 
but I can't.
Anyone else have this happen to them?