Since there are rituals that involve the permanent sacrifice of a “portion” of one’s magic, it would seem plausible that the Source of Magic has some sort of accounting system for this purpose. And that resurrecting someone normally would not necessarily restore the initial “balance” (which was presumably revoked when the Source detected their “death”). Even if the initial balance is determined by your genetics.
Since there are rituals that involve the permanent sacrifice of a “portion” of one’s magic, it would seem plausible that the Source of Magic has some sort of accounting system for this purpose. And that resurrecting someone normally would not necessarily restore the initial “balance” (which was presumably revoked when the Source detected their “death”). Even if the initial balance is determined by your genetics.