Yeah. Remember when the Joker could actually be funny (in a black humor sort of way) and clever, and wasn't necessarily going to kill people with his schemes? He just wanted to be a troll of the highest caliber and put one over on Batsy and the police?
Much like Batman, he's been replaced by a pod person and he's glitching out! 3 Jokers not ending with the return of Bronze Age Joker and Batman while the replacements get killed off is its greatest sin.