What causes picked up ( and attached) weapons to slowly start drifting from socket position?

There is nothing here that should be blocking the player. The basebatactor bp is just a static mesh as the root, and a box collision attached to that, and in both its set to overlap all.

The object type is set to “weapons”, a collision preset I set overlap all by default. On the third person character, there is nothing set to block that weapons channel.

Ok the server needs to pickup and attach the item, and the items replicated, I will keep that in mind but have not gotten to multiplayer yet. Thanks for your input.