Bug with red trinket and Shaco boxes.

Shaco boxes don't seem to be disabled/revealed by red trinket until the trinket self-upgrades to the level 9 version. After you reach level 9 the trinket starts to work properly versus the boxes.

Note, I'm not talking about the upgraded version that costs 250 gold, I mean the upgrade that occurs at level 9.

Edit: Might also not be working with Teemo traps.