Awww poor wittle Starlight isn't trusted after all. Too bad she gave me a VERY legitimate reason why by her impulsive actions earlier in this very episode....
If you're talking about Starlight changing BM, that was treated as wrong. AJ was furious and wouldn't put up with any nonsense. Given the context in this case, it can slide.
What I can't let slide is that it implies Starlight is still impulsively controlling, which is a problem. She does not deserve anyone's trust if she couldn't see for herself that it was wrong for her to do that. And yet, why is Twilight so vilified for not trusting her again?
The problem here is she didn't trust Starlight because she still believed Trixie was a terrible influence, not because of the other scenes (which she never witnessed).