He was doing his job, he's the hunter, you're the follower. He was saying "hurry up!". Beaglers follow on foot so he's expecting you to follow. A lab is supposed to fetch and come back. Big difference.
I've had two beagles that were great off the leash. If I tell Molly to sit stay she'll do it no matter what she smells. Franny had terrible recall when she was young (i.e. couldn't be trusted off leash), but was great as she got older.