Not a bug A.C The 5th EvilScientist Shane bug not spawnig

[mauricio]

The 5th Evil
Scientist Shane bug not spawnig 3x in 4 dgs

 

[ExCaliose]

if u do relogging method to make ur skill CD during solo it will be bugged,

dont relog, and it works just fine

 

[Manijak]

The 5th Evil
Scientist Shane bug not spawnig 3x in 4 dgs

That is bug that we have for long time, its trigered once you logout from dungeon and join again(aka relog char),
and as ExCaliose told you simply just dont do that and you will be fine.