When you hold down right-click while holding a barrel, it places barrel as expected, but then it displays the "open" texture if you keep holding right-click button, then it doesn't place barrels anymore. The game doesn't display the contents of the barrel itself, not even a GUI at all. You can still proceed playing the game normal with the same texture displaying. (I haven't tested this in other platforms because I can't, but feel free to do so.) I'm playing with a mouse and a keyboard connected to my phone (I am playing in full keyboard mode). It only occured to me in Android version in the release version (not beta).