Can't FaceTime one contact
I have an iPhone 6. The person I'm trying to contact has the newest iPad. We both have just updated our devices with the latest iOS. They can FaceTime me, but the only way I can FaceTime them is by selecting FaceTime in a recent call. It just doesn't show up for their contact.
I've had three other people try to contact this person and they all could FaceTime them with no problems. To further complicate things, I can iMessage them. I just can't FaceTime them. They don't have me blocked. I don't have them blocked.
I've tried
multiple soft reboots
multiple hard reboots
signing in and out of FaceTime and iMessage
Deleting the contact and re-adding it
FaceTime overboth both wi-fi and cellular data
I've got FaceTime activated in cellular data. Anyone have any idea WHY I can't contact this one person and only this one person?