facetime calls in the middle of the night

For the last three nights my phone has invited people to FaceTime at 3 am. It is always the same group chat and it is always 3 am. There is no record on my phone that this is happening. But on their end both of them have me asking to FaceTime in the group chat. The have both shown me their screens with me asking for a FaceTime chat. After the first time it happened I made sure my iphone has the latest update AND I disabled FaceTime on my phone so it couldn't happen. Then it happened again the next two nights.

For reference I have an iphone 6s.