This is because dopamine measures prediction error, not uncertainty. Honestly did not want to read the lengthy grandparent comment that was probably wrong but h

This is because dopamine measures prediction error, not uncertainty. Honestly did not want to read the lengthy grandparent comment that was probably wrong but here I can say confidently that these days it's pretty well known that the phenomena you mentioned is due to prediction error. Weird thing though is that it seems to only be measuring positive prediction error, complicating our understanding of how our brains carry out temporal difference learning.