>>211957893
Your understanding is entirely correct.
In modern Japanese, "Aに限ってBだ" is sometimes used as a nuanced expression of criticism or dissatisfaction, as in your example,
>"A person or a thing having the property A is, in fact, contrary to apparent expectations, always B (B is usually something negative)".
I don't think dictionaries or other sources detail this point, and I'd like to hear other Japanons' opinions.