There is a material duplication bug. If you're viewing the contents of an ATV crate, then right-click on an item in your inventory and select split, enter a value in the first field (don't use the up/down arrows), then press enter, then click split. You'll get the number of items you entered, but it doesn't reduce the number of items in the original stack.

Bug

Ok

0.01665

Yes

1.0.7