Leviathan AI Double Stun Bug

I assume you mean in a Leviathan vs Leviathan battle?

Yes, though I can't say whether this bug also happens using another capital vs Leviathan.

I will check that with the unit designer. But that might be working as intended. "Wrath of the Sith" grants a Reinforcement Bonus:
Reinforced Sith ships can't be evaded, gain 5 stacks of Ferocity, ignore Taunt effects until the end of the turn, and Stun target enemy for 1 turn, which can't be resisted when deployed.

If the opponent takes over your Leviathan, they have the stunning bonus from their cap ship and from yours as well.

If that's the case then this is a stealth change as it has never worked like this until now.

Just had this happen to me in a Leviathan mirror match for the first time. Seems like it should definitely NOT work this way because the player doesn’t have the ability to select multiple units to target so it’s a bit unfair.

Also, this is a separate issue but I’m 90% sure my opponent’s Sith Fighter (R5) went before mine (R7, all 6 dot mods)?!?

Just FYI @EA_Gunner in case you weren't aware, this bug is back again after previously being resolved.