I too experienced this issue and was beyond frustrated. I came across a suggestion by another owner of the S9+ on a different forum and found the suggestion to solve my problem (hopefully for you it works as well)! Here's what I did: Settings< Notifications< Advanced (top right-hand corner)< Turn your contacts to "allowed" I really hope this works. For the amount of money paid for the S9+, it's shameful to have such a minor yet, important feature make it a dreadful purchase. Good luck!
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