You can tell from Trump's body language it was bothering him also. Took deep breaths of annoyance, signaled with his hands to let Bannon know (didn't pick it up though), and even said mid interview one time: "can you let me finish the story?". I've talked to people like that also, just waiting for their turn to talk. Bannon was giving a lot of positive reinforcement the whole interview though so it 'broke even' so to speak, but Bannon makes Hannity look like nothing with the interrupts.
Trump was telling some rare stories I never heard him tell before and it was just Bannon going off on tangent after tangent and half the stories weren't even finished being told. Anyways Trump gave him some positive comments, I just have beef with the interrupting, also he talks mad shit vs Elon a lot without any evidence. Yeah Elon's got dealings with China with Tesla but he also owns Starlink and works with US DoD.