No notification sound when locked

Hey people, how's it going? I just got my hands on the Fold 4 and I love it. There are some quirks here and there but so far nothing is what I say unusable. However, I don't hear the notification sound when the phone is locked. I thought it was because I was distracted with something elese but I kept missing my notifications after I locked the phone. Unlocked, the notification sound is how it's supposed to be. Checked every setting and all notifications are on. Have you guys encountered this issue too? How do I fix it?