Welcome to our forum. Whenever one adopts a new kitty, it should be taken to the vet for a checkup. It will start a medical chart on your kitty. That being said ... yes, most bengals can "leap tall buildings in a single bound." And there are bengals who are simply not very agile. Mine about tumbles off the back of the couch that is 5" wide. I'm not sure how high you think your kitty should jump. Mine uses the scratching posts to get up on his cat tree.
There could be a couple of things going on. First, eyesight! A vet would check to make sure the eyes are dilating properly. Congenital cataracts are common in some bengals. Second, something neurological. However, that usually appears in other areas such as simply walking.
I truly don't know if this is something serious, but just a trip to the vet for a checkup might relieve your concerns.