Final Fantasy Type-0

[rockmaniac85]

Hi guys, Playing this game on my OnePlus One. So far its quite good and running well, except for occasional lag..

However, I reached the boss Brionac, but after depleting his HP, nothing happens, Its like he just drop his head on the middle.. but nothing happens.... Nothing moves on....

Kinda sucks because I can't move on after that

Edit : I checked the video. It seems after depleting the HP, a killsight should appear.. However, it didn't appear in my case

Edit : Fixed, it is due to the Infinite time to obtain Phantoma cheat that I have enabled. Disabled that cheat, and the issue is gone

However, how do I improve performance on this?