[Client] If you switched tabs while orpening a Hextech Chest, you will NOT get any loot.
League Bug
Attempt to recreate: none beside the incident
So, when I clicked the lootbox to open my chest, at first the animation feels abnormally laggy, and then after I clicked the open button, no sound effect nor animation came through for a while. There must be something wrong I thought, and I switched tabs hoping that my lootbox will just be reset. Sadly, when I came back to the loot tab it was gone. There were 0 new skin shards, my orange essence stayed the same, and my keys were reduced by one (confirming that the command to open actually got through).
I sincerely hope that riot fixes this quickly (considering that some player do pay real money for the chests), and is able to read the chest that I lost.