When jackd is started by an external program (e.g. Ardour), while Qjackctl will correctly show jack is started, the Buffer Size listed in Messages>Status will not be correct (maybe other fields as well).
Instead of showing the buffer size Ardour started jackd with, Qjackctrl uses whatever buffer size Qjackctrl last started jack with.
jack_lsp -l confirms that Qjackctl buffer size in incorrect.
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