Baby cries with everyone but me

My baby is 4 months and seems to have a hard time (cries) when she is being held by other people. She is only fine with others if she can see me or if I am holding her and they are interacting with her that way. I already have a hard time leaving her and this is just making it harder for me! 😭

I've started going to playgroup to get her used to being around other people but I dont know what else to do! Anybody else have this issue?