Following news that the celeb couple decided to call off their engagement, E! News has learned from a source close to the pair that Packer's behavior played a role in Carey's decision to part ways.
"James is not in a mentally healthy place right now and he has not been present for her," the insider tells E! News exclusively. "Unfortunately, his absence and behavior was not a good situation for her, so she had to leave him."
A rep for Packer tells E! News, "This is simply untrue."
Neither Carey nor Packer have publicly commented on the reported breakup. Australian tabloid Woman's Day was the first to report the split, with TMZ shortly after claiming the duo called it quits.