New boss - bahamut. Just spams 1 spell, bug?

[Lampogriz]

try to telestomp him, he wont spam that spell so often then
anyway that spell deals too high dmg in my eyes

[Fitsu]

try to telestomp him, he wont spam that spell so often then
anyway that spell deals too high dmg in my eyes

I tried that, he still spammed it... But I will try it again, thanks.