From the inventory to the backpack is not split up

When I right-click on stacks that are larger than specified and drag them from the backpack into my inventory, they are split into the size of the stack size controller.

But if I right-click and drag stacks that are larger than specified from my inventory into my backpack, they keep their size. Could you check this?

http://kobani.de/rust/Stack.mp4

Did you ever find a soloution to this?

7331nonA

Did you ever find a soloution to this?

Plugin ChestStackMultiplier