After packaging, my default pawn seems to be wrong.

I checked the project setting about map and gamemode, it was all correct. When I play it in the editor, the pawn I’m using is invisible at the beginning, but when it got packaged, I can see my hands that are supposed to be invisible. And also some small problems after that, like set view target with blend go to the wrong BP.

Can anyone tell me why is this happening? Really couldn’t find a solution. PLZ help~