Maybe he's just in his feelings. The show said it’s not permanent but he seems to feel otherwise:
Soap Opera Digest shared, “Although Eric moved to Paris with true love Nicole and their son, Vaughan’s absence from the canvas won’t be permanent.” Meanwhile, Greg took to his Instagram story and shared the news item. The Daytime Emmy-winning actor, also shared, “I didn’t leave by choice. I never had a choice.” That statement came with a broken heart emoji symbol
I don’t watch DOOL so no idea if he’s under contract or not.