Ok for re-adding some old feature its pathetic that its now completely busted and unusable.
After using it for a few minutes, you will encounter a "light blue highlight" over your cursor preventing you from clicking minions, towers, the shopkeeper, or any jungle minions including the dragon and baron.
Switching back to the updated cursor carries this bug over. Making the game unplayable, the only way to reset this is by disconnecting and reconnecting.
This needs to be fixed like seriously...