Short: Reborn octosari summomed a 4/4 on deathrattle instead of a much larger creature(22+/22+)
Long:
I just had a game in battlegrounds. I had an octosari, non-golden. It was summoning a 22/22 on deathrattle. I gave it reborn. It was the last creature. It died and triggered the deathrattle. It summoned the 22/22 and was reborn. I expected the the death of the rebirth octosari to produce a 24/24 due to the resummoning of the original octosari/ However instead a 4/4 was summoned. Seems like a bug.
Doesn’t Octosari have to be on the board to count the minion summons for the buff? I think because the 2nd Octosari is a new minion, it doesn’t have a memory of any minion summons from before it existed. I could be wrong about this, but that is my guess
When a minion with reborn dies it summons a brand new copy of its base version
The reborned minion does not retain the buffs of the original one. The same way, a rebornned Octosari that gets improved during the fight will not improve the original Octosari, they ar enot the same minion