Question) Can decaffeinated coffee also affect sleep?

I often drink decaffeinated coffee because it's said to have almost no caffeine, but I'm wondering if this could be affecting my sleep. Sometimes, when I drink it in the evening or at night, it feels like it takes longer to fall asleep, and I'm not sure if it's just my imagination. I drank it because they said it was decaffeinated, but I'd like to know if it could affect people who are sensitive to caffeine. Has anyone actually had trouble sleeping after drinking decaffeinated coffee? Could you share your experience and tell me up to what point in the night it was okay?