Yeah I lost a job as cook because I served a French dip without au jus. This was during a transition period between owners, so the menu and stock was in chaos constantly. For some unknown reason we started making our au jus with beef base instead of a dedicated au jus mix like we'd been doing for over a year at that point. Nobody informed me about the change, so I just assumed we were out and pushed the French dips out. Next thing I know, I'm sitting with the owner's husband 'explaining myself' about how I could make such a colossal mistake with a 'high profile' customer.
Nobody ever informed me about the recipe change, Nobody told me that this specific customer was 'important'. I explained this to him, but he still said "we'll find something else for you to do" and proceeded to never schedule me for anything else. So I took a job working at a competitor down the street (who is wildly more successful for reasons you can probably imagine) and I'm much happier not having that boss anymore.
Best part is that apparently my old boss is SUPER salty that I found a job elsewhere so quickly, I guess they thought they had me by the balls since I live in the trailer park out back.