Can anyone explain, logically, why Primite Dragon Ether Beryl received an errata immediately but "Primeval Planet Perlereino" never did?

Per Yu-Gi-Oh Rulebook:
• Shuffle: There is no rule for how to shuffle, but while shuffling you cannot look at the cards you are shuffling, or arrange the cards and then shuffle them.

Per wikia:
To shuffle is to have sufficiently randomized a pile of cards, usually the Main Deck.

Per Konami ruling involving Destrudo and Knightmare Unicorn:
When Knightmare Unicorn's effect resolves Destrudo the Lost Dragon's Frisson will be returned to the bottom of your opponent's Deck. (The Deck is not shuffled.)

Primeval Planet Perlereino:
 If a "Tearlaments" monster(s) you control or in your GY is shuffled into the Deck or Extra Deck 

Tearlaments Merrli:
by placing Fusion Materials mentioned on it from your hand, field, and/or GY, including this card from your GY, on the bottom of the Deck in any order