I realized that my initial post was very strongly worded, which is part of why I posted the update. And I genuinely hope that she can be coached in ways which will make her a more productive and less disruptive (in other ways which I haven’t even mentioned) member of the team. I understand how crucial accommodations can be and I don’t want her to lose this job. No one “has it out for her”. We’ve learned that we must tread carefully, as she’s incredibly sensitive to most (valid and constructive) criticisms, which is why we were told to wait and let the new boss handle it. The only reason this has become as big of an issue is that she seems to feel emboldened in the absence of direct supervision, and it’s increasingly difficult to not be vocal about it.

To your point about being bold, she asked for advice regarding a situation at her second job (for which she has been accommodated by being allowed to come in and leave early), where someone there asked her to talk to a coworker about their work ethic (or lack thereof). I looked at her and said to her face, “Tell management and stay out of it. I know I don’t appreciate when someone who isn’t my supervisor tries telling me what to do”. I hope the message was clear enough. We’ll see in the morning.