Open [1.2.1] Evershifting tower no reward on the last floor

[Longgeqiubai]

Player ID : 1341371
Player name : ggwp-xd
Platform: Steam

Hi there!
I just finished the last floor on the evershifting tower but can't find the chest at all. (I've restarted the game once already)

screenshot:

https://imgur.com/M3IQshq

prev.log:

Initialize engine version: 2019.4.30f1 (e8c891080a1f)[Subsystems] Discovering - Pastebin.com

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Hope this helps