Issue with minions

On June 1, 2023, I made a necromancer as my main character in Eternal Realm. It is level 60 and every time I exit the game, when I enter again my 11 skeletons have disappeared and I need to recreate them.

On February 2, 2024, I made a necromancer hc in Eternal Realm. It is level 60 and happens exactly the same thing. The skeletons disappear between games and I need to recreate them.

I made a necromancer in Season Realm. It is level 60 too and the skeletons continues to hold up from game to game without needing to recreate them.

The 3 necromancers are the same:

All 3 have completed the campaign
Same custom Talents and Passives
Same legendary traits
Same glyphs

Curiously, the skeletons don’t disappear only in necromancer made it in Season Realm.

Whats happens with Eternal made necromancers?

Why I can keep skeletons between gameplay sessions with a Necromancer made it in Season Realm and with my Necromancers made them in Eternal Realm the skeletons dispawn between gameplay sessions?

EDIT November 16th: Playing with a necromancer in Season 6 Realm keep the skeletons from session to another session. My Eternal necremancers of June 2023 and February 2024 (both made it in Eternal Realm), can’t keep skeletons from session to another session.

Best regards