Creepy FaceTime Ghost Glitch

So I’m usually up at night and have my anual FaceTime with my girlfriend who’s at home. Recently when things go quiet for a minute (normally when she’s asleep) there’s this weird white noise that happens out of no where and voices of people cutting in and out saying random things that can be hard to decipher. It’s like radio waves are accidentally crossing the call. After about a couple seconds of that happening, FaceTime hangs up. It’s getting annoying how it’s becoming a common reoccurrence and I can’t find anything online that talks about this. I have the latest iOS and my iPhone is a 13 Pro. Can someone help cause I’m getting creeped out . It’s unsettling hearing strangers voices come out of no where while you have your AirPods in while the other caller is asleep.