Poor communication from all, and an itchy senior made this relatively common and simple problem turn into a mass of paperwork and headaches.
Chimps.
Sad but true, and there are far too many of them in the CC ranks, today.
It's all part of the perceived idea that all crew are somehow 'equal' and have the same knowledge.
Sorry...just ain't so.
Most CC are far down the list in the smarts department.