Seniors being pain in ass

I work as a SDE1, and have been working on a new project, and I get it the deadlines and all but this senior have been pushing commits on my PR. I get it I'm a noob but they could leave comments or maybe get on call.

Even yesterday this dude pushed refactor commits, it's soo irritating as I have to go through his changes and tbh refactoring is fine but he doesn't have to change everything whatever he finds better.

Talked to my manager, he mentioned its fine but not everytime.

Ps: yeah ik it helps me to leaen but it's damn irritating.