Problem with skinning or skeleton

Hello! After a weeks of trying resolve problem, I decided to ask for help.I imported UE skeleton to maya and skinned my character to it. Then I imported animations from UE to maya and cheked it there. Everything works nice! But when I export my mesh to unreal and check the same animation in UE , some problems occur. I already checked “max influence” it’s set on 4 . But it doesn’t help . I hope you will help me .Thanks!!!