JC, why don't you just wait until you've shut down and then ask him if there was anything wrong with your approach and landing.
If he says no you can then ask him why he felt that he had to interfere.
If he says yes you can ask him if that was the reason he felt he had to interfere. (you can be a bit more diplomatic though)
You never know, he might not be aware that he is doing what he is and instead of dropping him in it with the senior trainers you may just help him too.