Coastal Mines Collection Chest

[Camryn]

I'm finishing the last area for 100% completion and it includes a collection chest in the Coastal Mines. Whenever I go to open the chest it just opens without giving me an item and does not count. Is there any fix for this at the moment?

[AngryGoblinNoises]

Yo! I had a very similar issue and here was how I got around it. Found it on the bug post about it on the the bug reporting website:

firstly teleport to “Room of Requirements” (vivarium) have a auto save to reload there reload your auto save

Speak to Deek change the room to anything different
Go in 4 rooms (Default, Meadow, Coast, Swamp, and Mountain) in vivarium there are 3 chest in each one these rooms and 1 chest will respawn you just will have to locate it
There you go enjoy your 100% platinum.
This worked 4 times as long as you follow steps it should work ^_^

As stupid as it sounds that’s how I found way around it.

Hope this helps you like it did me!

[C.A.M.B.O]

It worked for me!
I had a bugged chest in Moonstone Garden, after i changed the Room of Requirements style i found the last conjuration in the Grassland Vivarium.
The maps still shows 116/117 but i have all the conjurations unlocked and got the achivement

[T'old Senners]

!!!!!!! This fixed it for me. They did an update recently saying this sort of stuff was fixed, my phoenix mountain was still bugged. I'd pretty much given up. i Did exactly as was said, i did end up searching all 4 vivariums but in the last 1 (ironically the mountain 1 where my phoenix is) i found a chest id previously opened was now closed and i opened it, got the cheev. My map still says 1/2 for phoenix mountain in the world map but whatever