Halo may not have been ‘handed’ properly. (The ‘handing’ process allows the lock to determine which direction to extend the deadbolt.) Halo will automatically ‘hand’ the first time it powers up. If you need to re-hand the lock, please see (link to install guide/install video?).
Halo might be jamming. Check that the bolt hole is at least 1” deep so the bolt fully extends. Check that the door closes properly so that when the deadbolt is extended, it is going into the bolt hole and not hitting the deadbolt strike or door frame. Check that the mounting screws securing the exterior keypad are not over-tightened.
For new installations, please be sure to check that the lock was installed with the latch extended and in the lock position.