Eldarium infused chest , not craftable ( wrong workbench name in the description FR / EN maybe more ) EDIT : ALL DECORATION ADDED IN 2.3 ARE MISSING FROM ARTISAN'S TABLE IF YOU DIE AFTER LEARNING THEM

Conan Exiles General Discussion
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I would recommend posting the bug reports in the bug section, even if they are siptah specific (you can specify that). It may take longer for the report to be noticed if submitted in this section of the forum.

The issue has been acknowledged by Funcom here: