I see no real evidence of gravity after Romilly asks Cooper to stop the spinning. True, after they stop spinning Romilly is still next to Cooper's chair in the same position he was when he was standing next to the chair in artificial gravity, but we only see him from the chest up, and we don't see him walk around or anything. So, it seems possible that he's still in that position either because he was very careful about not pushing off with his feet, or possibly he had some trick for keeping his position stable like wedging one of his feet under the chair. And after that one scene with Romilly explaining the concept of wormholes as bridges in a higher dimension, the next scene is them actually traveling through the wormhole, it still looks like the ship isn't spinning but they're all strapped into their chairs so the lack of gravity shouldn't matter. Then after exiting the wormhole on the other side, the ship is spinning again in the next shot we see of it.