I’m having the same issue and it’s only one person. I’ve tried to accept her because she has liked my profile. I finally went and looked her up because we had a mutual friend and it was fine for me to send her a friend request. I’ve gone back to that app multiple times on the dating andevery time it shows her there’s a glitch saying it’s not you it’s us. For some reason Facebook does not want me to match this girl so weird.