FaceTime connects to random person

On two occasions, my wife has called me and instead been connected to a stranger. My phone number has not changed, nor have I recently changed my Apple ID.

She's being connected to a random stranger (i.e. she's not accidentally dialing a different contact). On both occasions, she was connected to the same stranger.

In this case, my wife was calling me from her iPhone and I tried to answer on my iPhone. In the prior case I can't recall what devices we were using.

It doesn't seem to happen every time. For obvious reasons, I don't want to try to replicate the error.

So, I guess my question is: what's going on? I'm computer savvy enough to know this a profoundly weird an unlikely error. If it wasn't my wife, I wouldn't actually believe it happened. But, based on other messages, I don't seem to be the only person this has happened to.