I am also experiencing this I have place down three barrels all within a ten-foot radius of each other inside of a pre-existing structure two out of the three barrels are completely full and when I attempt to access the inventory of one of them my game crashes every time I don't know if this matters or not but the one that keeps crashing my inventory is a yellow Barrel the blue one next to it allows me to come in and out without an issue I am playing on Xbox One