An issue of responsibility, or a reminder of an important responsibility.
Losing your seat or your place in line to someone else can represent: the idea of someone “taking from you” in some way (such as stealing your limelight, taking advantage of you, or ignoring your rights or needs somehow).
See also the item you lost.
See also: Forgetting; Missing Person; Left, Being; Finding a Lost Item; Setting Down; Seat; Cheating; Waiting; Lost, Being; Failure