My manager just told me this at the end of the work day.

Today, my manager got a call from client "X".

They wanted to know why issue "Y" happened at event "Z" that was being put on for their client.

My manager basically told them we had nothing to do with that part of the event, so we wouldn't have had anything to do with solving problem "Y" either, but that what ended up causing problem "Y" had been passively mentioned to us months ago, and that he's not sure why their client didn't communicate it.

Client "X" told my manager that they would call back after talking to their person that helped organize event "Z".

No call back.

Definitely rant-ish, but also kind of a funny/ridiculous story to end the work day with.