https://www.wowhead.com/news/diablo-...28987#p5438936
you can see the blizz post where the riddle was shown. Some reported it as a possible release day hint for D4.
cypher was decrypted using the vigenere cypher. jseuepkgfwzyelxfklgliriefaveyouiujqwue with keyword Resurrected decrypts to somanygemswhatdotheseorangenumbersmean or "so many gems what do these orange numbers mean?"
feel free to verify yourself https://www.dcode.fr/vigenere-cipher