This morning, I didn't have my coffee yet and so I made a decision that I thought was a horrible mistake; I went into Vargas lvl 3 dungeon with a squad that wasn't quite ready yet:

• Felneus SBB 4 Leader
• Duel SGX SBB 1 (I'm a noob, I know)
• Michelle SBB 3
• Sefia SBB 2
• Il & Mina SBB 4
• Zebra friend

Long story short, I reach Vargas (used one gem on 2nd stage), SBB with everything, bring him down to around 55%. Hit him twice with normal attacks to bring him to around 40~45%. He BBs and kills everyone. I revive with gem, SBB with everything, and expect for him to revive and wipe me again....and nothing. He stays dead and I get the rewards, using only 2 gems. So did they nerf the dungeon or something? Cause every guide I've read said that he revives when killed back to 25% and SBBs...but that clearly didn't happen...

TL;DR: Killed Vargas and he didn't come back to life. Is this a glitch?