Unsightly is when the spring and detent go bone dry or you get a wad of mud in there that cocks it the other way and won't let it return.
OR it sounds like a pice of 75 grit sandpaper working a beer can when you turn the body or knobs.
Then all of a sudden your windage adjustment has gone all to shit, but if you start turning the thumbwheel whatever was jamming it may release leaving you with the sight where it is supposed to be, but the windage off again because you tried to compensate instead of correct
Best bet is to give it a quick twist side to side to see if it returns to position and not hang up while doing other pre-use checks, like looking at the front sight post to see if its been bent or the tip of it is dinked or really any number of prep steps.
Checking to ensure the chamber is empty before heading to the line?
Reach up above the CH and give the sight a quick tweak, since your hand is right there anyway.
Shooting oil in to wet the bolt?
Hit the sight with a quick shot and give it a wiggle.