Steam Deck - Opening another game without closing Poe 2 deletes Character

As stated in the Title.

Decided to post here after reading that the same thing already happened to another person:
https://www.reddit.com/r/PathOfExile2/comments/1hir1f6/character_disappeared/

So, in the meantime, do not open another game while Poe 2 is running on Steam Deck.

Still waiting for support.