Oooh That's A Great Concept And An Excellent Point - Tumblr Posts

Supernatural September - Day 4 | Glitch

Canonically, Dean never said Cas’ name after the fake phone call in 15.19. Canonically, while Bobby said Cas “Helped” revamp Heaven into a Heaven that Dean “deserved,” Cas never showed up. Canonically, Dean left that heaven, which contained his family, to go “find family.”

There is a glitch that is Cas-shaped, and Dean knows it.