How to stop my dog from hurting other dogs when trying to play

(I don’t know the correct wording to use for the title)

I have a 8month old Boerbol x we have no idea

He is a very sweet dog who isn’t violent in any capacity. He doesn’t growl at any dog (even when he’s been charged at twice), he has a very soft mouth when playing, he doesn’t try (to my knowledge) forcefully to display any dominance.

The problem is when I take him for a walk and he sees another dog he sprints full speed up to them and basically shoulder charges them and he also starts jumping up and down (sometimes landing on other dogs) He is 50kg so obviously this is not ideal He thinks he’s playing and shows no violent intentions towards the other dog.

I keep him on the leash but I tested it out today as he has been doing a lot better on leash and immediately he tried the same actions on a smaller dog leaving the owner mad at me (understandably)

How can I begin to correct this Ive taken him to puppy training/ socialising since he was 10 weeks. And at the training he seems okay but at the park he is a menace.

Any advice or criticism would be super helpful