Can you remove unknown group FaceTime invites?
My daughter's iPhone X kept getting a group Facetime call with 16-18 participants last night.
Sensibly she did not answer though I was tempted to.
Potentially just a wrong number entered in a legitimate group chat, but who knows?
Despite blocking all callers from these calls there were still 2 presumably active calls at the top with a Join icon - I could see no way to block these and only just avoided 'joining' accidentally.
iPhone X