Kled bugs that I know of
If you unlock Kled's W while attacking, his fouth hit will not do bonus damage. Additionally, if kled's W is active and is leveled, the fourth hit will not do bonus damage.The attacking proc is tricky because it's reliant on a certain frame, but leveling it mid proc has a 100% chance to prevent the bonus damage. This is extremely irritating when you level it mid fight and lose the fight because of this.
(Not sure if this is a bug or not, but Kled's R will attach to people who are behind him. I would really like to know if that is a bug)