Missed calls not showing up
I've got a serious problem where my iPhone won't show recent missed calls until a few hours later. It's quite annoying, especially if I need to call someone back. I'm certain that I had Do Not Disturb turned off and the call sound and notification sounds up as I could still hear app notifications. I also know it's not my carrier's fault as I have WLAN calling turned on, and I'm able to receive phone-calls from other states. The issue seems to be for calls in-state (as far as I'm aware).
I would appreciate any help or advice that you could give me.
iPhone 7, iOS 11.1