I used Sith Eternal Emperor with Armorer and Sith Empire Trooper against Cassian Undercover, Kleya, and Luthen.
I was able to defeat Cassian first and then linked Kleya and Luthen with SEE. After Cassian was defeated, the team lost its Instant Defeat Immunity as expected.
However, when I used SEE's second Special ability (the instant defeat effect), Luthen was defeated, but Kleya survived with very low health. After that, she could no longer take damage and could not be defeated for the end of the battle.
As a result, the battle became unwinnable and ended in a timeout.
