Not going to mention the C word as it's not about that
It could be any situation you've been in where you would usually complain about something but at the time thought , well worse things happen at sea, and let go ... but you would have brought it up if everything had been ok
There have probably been a few for me lately but the one I can think of is not questioning why my Tesco and Sainsbury's points haven't been added . Not so much a complaint but I would have contacted them about it ... now it really doesn't seem so important considering .