If a unit that has been affected by the Soul Catcher (Shadow Demon) is sent to limbo, while holding an Aegis of Immortal or having the skill Reincarnation (Skeleton King), that unit comes back to life without the Soul Catcher effect/debuff.
It also should overcome actual Death.

Reproduction Steps:
  1. Get a Shadow Demon with Soul Catcher
  2. Create an enemy Skeleton King with Reincarnation
  3. Cast Soul Catcher upon the Skeleton King
  4. Kill him
  5. Wait for the Skeleton King to come back to life

Current Result:

Skeleton King resurrects without the Soul Catcher effect.

Expected Result:

If the Soul Catcher hasn't expired during the resurrection delay, the Skeleton King should come back to life with the remaining Soul Catcher effect.

Soul Catcher has a 12 seconds of duration. Not for the actual Death maybe, but definitely important for both kinds of resurrection.