I must be doing it wrong. It only seems to pick up some recently added shows. Continue watching often doesn't have the thing I've previously watched. Trying to search for a show with a macrōn doesn't work.
It's like it's working against me. It's bad.
Maybe I am misunderstanding, but continue watching is only for resuming media. If you stop a show or movie in the middle.
If you want to go to the next episode in a series you want to look at "Next up" section.