If you attempt to sap / cheap shot a target who’s just entering stealth and you drop sight of them your stealth will clear as if you executed cheap shot but it will not go off.
(Enemy rogue does not use vanish here)
Is it possible that Cheap shot and Sap are executing after stealth is cleared (Aura)?
If so can the state of aura clear check for cheap shot / sap execution first?
If cheap shot cannot be executed then a check could be made to prevent stealth from clearing?
Same could be for Sap (Classic WoW)
Dueling with a friend I have found this to be reasonably repeatable. The trick is to attempt to execute a cheap shot or sap (classic untalented) just as the rogue “disappears” from sight via just regular stealth.
What will happen is the enemy target will gain stealth, and you will drop stealth doing effectively nothing but standing there.
