Moving all items from a vehicle container to an adjacent ground tile by pressing “,” causes all stack amounts and charges to be reset to 1 regardless of their original value. Moving them manually with the enter key works correctly.
Edit: Scratch that- I’ve just noticed what the problem is through a bit of debug testing, move all is only moving a single item when a stack is involved… Example: You have a stack of 100 9mm rounds and a stack of 100 .22 rounds on a tile, hitting move all will only move a single 9mm and a single .22 round to the targeted tile, leaving 99 of both on the source tile.