Is this normal after neutering?

My rabbit was neutered 3 weeks ago and since then his behaviour has been more like it was when he was a young bunny. For example trying to jump up everything like dining table etc. Since November he had calmed down from doing that and was more wary about doing that. Is he likely to go back to how he was just before the op or do you think he will be more like how he was as a young bunny? I feel like I've gone backwards a bit with him and have to supervise him more often again. Is this normal?

Some rabbits lose their litter training for a while post neuter so I would imagine this is similar. Hopefully he will settle down again shortly!.