[confi]Scion of Darkness die & damage no trigger+regen issue

[Aswan jaguar]

Describe the Bug:
1- It has the usual bug: If Scion of Darkness dies in combat but still damages opponent it's ability doesn't trigger.
2- If in the above scenario you regenerate Scion of Darkness then it triggers correctly but if you have killed your blockers you can't select one of those they don't appear when graveyard opens.
Which card did behave improperly?
Scion of Darkness?

Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
Manalink 2016/08/27: Eldritch Moon v2, duel

What exactly should be the correct behavior/interaction?
1- If Scion of Darkness dies in combat but still damages opponent it's ability doesn't trigger.
2- If Scion of Darkness receives lethal damage in combat and kills the blocker but still damages opponent it triggers it's ability and even if you regenerate Scion of Darkness you can still select to get the dead blocker from your graveyard onto battlefield under your control.

Are any other cards possibly affected by this bug?
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