wondering about; curious to know, to be bothered by; to keep noticing, worrying about; being bothered by
What Seoyeon said yesterday has been on my mind. What is this…?
— ベイビー・ブローカー (2022)
Because there was a child who committed suicide in the past, I’m very concerned about it.
— ジョジョ・ラビット (2019)