Thinking like a human and not like a bear by taking the bait away from him may make him sporadic . Bears don't live off a bait, especially in the fall ,they are trying to put as much fat on as they can and they have to have their natural foods such as berries , acorns etc.to do it, instinct tells them that and it takes president over an artificial food source. Your bear may be hitting the bait at night kind of as a treat after feeding on his natural foods . When the berries are gone and the acorns in his spot are eaten or other foods he may hit the bait earlier. You may try just using popcorn, a couple of big bags of buttered popcorn spread all over the ground may make him show up earlier and you are still feeding him. Or you might try using irresistible baits, the best thing of all for bears is ice cream they cant hardly leave it alone it will be melted of course but they really love it . Lots of sweets in the fall. Use protein in the spring and carbs (sugar) in the fall donuts, candy etc.
He may be hitting the bait at night because he has had a bad experience at a bait site before . He may have a broad head wound in his shoulder or a scar from a near miss bears like that can be almost impossible to get a shot at .
I baited bears for close to 40 years in several provinces and Minn. it was a lot of fun. I got more a kick out of baiting them and watching they're antics than I did shooting one .