Two real examples I knew: someone who started interrupting people mid-sentence to get clarification, and someone whose mind started going blank when other people were talking.

Behavioral training like LACE can be helpful for people who started doing things like that to cope with a hearing problem, but an audiologist should be looking at a filter (with APD you can be prescribed a filter for one ear even if you have no hearing loss, depending on your diagnosis.)

Neither case had anything to do with intelligence as demonstrated in every area of their life outside of hearing processing.

I and these others have auditory processing disorder as well.