I posted about this a week ago, but at the time I was attributing the problem to my smart watch, and I've since realized it is larger than that.
I have a Pixel 8 running the most recent version of Graphene. At night, I use the Graphene Bedtime Mode which turns on and off automatically. I have the mode configured to allow interruptions from my starred contacts. I do not have the "allow repeat callers" checked. I use the stock Graphene phone/contacts app to star contacts.
I regularly get a call at 5 am from a contact that is not starred. When this call comes in, both my phone itself and my smart watch go off. Last night I left my phone ringer on, so I got a loud surprise! Does anyone have any ideas as to why this would be happening, or how to prevent it?