In a 3 player game, if player 1 opens player 2's inventory, player 3 sees a player's inventory fill their screen even though they didn't click the GUI button.
Thanks for the report and sorry for the late response, didnt have e-mail notifications enabled....
I made a tweak to the mining logic, that should theoretically fix that part
Cant quite see what could cause the inventory issue however
Hard to test/reproduce this for me in real scenarios.