Mine traps that are triggered by opponent, remain in play as 'space blockers', for opponent only. for example: my opponent shadowspawns a mine trap; then on my turn my champ moves in range and triggers it's effects. For the rest of the game, I will see a mine trap on that square, and be unable to move a champ into that square. This has also happened with a dream box.
if u accidently step on this trap somehow ( KB or Spot remove or something) Your champion cannot move or attack. The enemy can attack it and can do whatever he wants.
I have noticed that this bug does not always present itself. It always presents when I trigger a Land Mine, but I have noticed when watching other games that it does not present. My sample size for this apparent discrepancy is limited, and my observations may be deficient; but that is what I have noticed.
Saw this bug twice today from land mines spawned by tortun privateer in one game and ironfist agent in another. relic is triggered, but stays there. blocks movement, is clickable, but cannot be attacked and doesn't really exist (doesnt trigger again).
