General Kenobi Speical1 working on Locked Debuffs

General Kenobi Special1 

"Dispel all debuffs from all allies and grant them the opposite buffs, if any, for 2 turns. All allies that were not debuffed gain Retribution for 3 turns. General Kenobi gains 60% Turn Meter."

Bad Batch Echo Special1 

"Inflict Buff Immunity on target enemy for 2 turns. Inflict Expose on all enemies for 2 turns.

Dispel all debuffs on target other Clone Trooper ally and call them to assist. If that ally was Bad Batch, this Buff Immunity can't be dispelled, and Echo increases the target enemy's cooldowns by 1 (excludes Galactic Legends). This attack can't be evaded."

So the buff immunity from Echo is supposed to be locked but General Kenobi can dispel it using his Special1.

Conq.jpg shows Great Mothers having locked buff immunity.
Conq2.jpg shows General Kenobi dispelling the said buff.