No, not an overreaction on your part. Why, is an acceptable question. Asking for input or some type of clarification, even if she cannot get into details, would have been more appropriate.
Sounds like a catch 22. Irksome, indeed.
Even more than delve into how it plays on your past, it could play into feelings of exclusion as a team member, places you in a predicament, if an overload of someone elses cases, trickles over to you. Etc.

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