Can anyone explain why this NPC welded companion doesn't function properly when cloned?

Hello, I am working on a sort of NPC that becomes welded to the player, It works perfectly if I straight up parent the NPC from server storage to workspace, but i need to clone it for my game and the result of cloning and then parenting to workspace messes it up somehow (see videos for portrayal). I would appreciate any input because I do not know what is wrong.

Intended Behavior (Without clone):

Unintended behavior (NPC Cloned)

Solved, I believe massless properties had to be all true, though doesn’t explain it working for nonclone and cloned.