[Event] Shining Chests

Bug Name:

[Event] Shining Chests​

Bug Description:

I know that this Event is kinda over but there are still some Shining Chests around in the Game-World, which is really awesome for those of us with keys for them. However I have just come across some chests that spawned in the Garmoth Lair, but I cannot interact with them at all, I opened one of them, and that worked just fine , but there are three more I simply cannot use at all. Do not know if it is a bug or just a display glitch, perhaps you can only open one chest per x time?
**Updated again: Changed channels and found some new chests, that I cannot interact with.​

How to reproduce/proof:

Garmoth Lair, Shining Chests, try to open.​