Everybody forgets. This is not what I’m talking about.
I am talking about a consistent, overall pattern of behavior wherein one says they will do, then they don’t.
Wherein others depend on someone to pull their weight, and when that someone doesn’t, others must jump through hoops to make it happen so that a larger, important project does not get delayed or cancelled and people don’t lose time and money.
“Oops, I forgot” gets old after awhile.