Chop ran away and is now missing

I'm on my first playthrough of GTA V, at some point I wanted to hang out with Lamar so I took Franklin's default car and figured I'd also take Chop with me. When I found Lamar, Chop jumped out of the car, ran away, and now he's gone. His bone icon is missing from the map, I can't call him, I can't throw his ball, nada.

At Fraklin's aunt place, Chop is missing too.

How do I make him show back up?