In the Mirror glitch
While I was playing the minigame, after I open a module chest, I somehow got a "System Error" which meant I lost my progress making through there (don't worry, I went back in to get it back), after that mishap, I decided to Solo Behemoth Level 5, but I have noticed that SFX of the minigame and the voicelines were echoed during the whole boss fight.
After closing the game and logging back in, it seems to have fixed itself.
#nikke