Apparently you cannot add more then one animator on Humanoid or AnimationController
which is odd and was added or bugged for no reason
because i cant create more animators without removing the previous one
completely ruined my effect script as animations supposed to be synced with previous anymore and with locally created animator
but the local animator just deletes the original animator
of course you can fix it by making a temporal body and changing original animator parent
but that would make it more complicated for no reason
please fix that bug or revert it