Whatsapp: getting no call vibration or sound if phone is closed

Hello,

Something weird happen with my phone and Whatsapp. I get sound and vibration for calls on Whatsapp when my phone is open.

If my phone is not open, I do not get virbrations or sound when I get a call from Whatsapp. I’ve turned off “Manage app if unused” and enabled microphone and camera permissions. I don’t have this problem with phone calls. Could you explain which settings I should check?

Kind regards