I assume he was broadside and you aimed just behind the front shoulder (using the crease like you do on deer type game). Well on a bear most of his vitals are somewhat protected by the shoulder bone structure, so it is possible your arrow struck this and glanced off creating a flesh wound. How to eliminate this is wait for the facing leg to clear forward on a straight on broadside, then use the opposite leg as a site line.The only hope on a straight on shot without that front leg clearing is to take out a small portion of the rear of the lungs or the liver. Liveris basically in the midsection of the body but not an ideal shot seeing tracking a wounded bear is never easy or fun with only a bow in your paws! Like mentioned the other good bow shot on a bear is quarter away.

If you retrieved the arrow give more details to what you found. I'd also be introduced in what BH you are using?

As far as if he is fine will he return, that depends on how hard he was pressured. If he ran off and wasn't pushed he should be back in time. If visav who knows? 50/50 I suppose but your stand shouldn't be comprimised, just may take some time for your scent to wear thin if you tramped all over looking for sign. Seen animals harvested out of the same stand within a few days of each other. I have yet to have black bear come in that didn't know I was sitting in the tree...mind you we use baits up here. It is more a matter if they really care or not!

Best of luck and hope you get a second chance.