Spooky baby monitor experience

Spooky camera experience:

We were downstairs watching a movie around 1130pm last night and all the sudden we heard like a little girls voice on the baby monitor where our twin boys were peacefully asleep. We didn’t know what it said, but could clearly hear a voice from their room. It wasn’t picking up the tv downstairs or anything.

we sprinted to the nursery, grabbed the boys and they slept with us (we did not sleep between both of them in bed and anxiety). I ended up bringing a rosary in there bc now I’m convinced our house is haunted but it’s a relatively new build although it is a townhouse with immediate neighbors.

For reference, our camera is the infant optic so no WiFi camera - closed loop.

Has anyone experienced anything similar?