technicality

"I'm so frustrated that my insurance claim was denied over a minor technicality"

"He missed the deadline by one minute due to a technicality in the submission rules"

"She lost the race because of a technicality about her starting position"

"Please check the contract for any legal technicality we might have overlooked"

"The game was won on a technicality when the referee noticed the player's untied shoelace"