How do i add a deformation effect on my actors

i made an actor component who deform its owner with functions simply with a vector,
(a function change the scale xy or z and the tick node return to default with an interpolation node)

this component work on my player , another character and actors. but on other characters, when i call the deformation function they disapear during the interpolation sequence. is their is something about the mesh component than i have to check ?