The racial "lucky" disables ability check rolls meaning this racial is not only a negative its a massive negative. I can confirm for at least a halfling monk's flurry of blows: topple & stagger will never prone or stagger the target. A savings roll is never made for those conditions, instead the combat log displays "dice was rerolled" 3x every single time either of those abilities are used. I would suspect this bug extends to every other ability check in the game.
