Master of Lineage 2

the bug occurs when the sp is maxed
if the sp is maxed you stop gaining the bonus exp (i believe its from vitality)

tested it and after i reseted my skill points (it needs some sp to do it) my bonus exp was back again.

I did not found anything related with max sp, I will keep searching.

try killing a mob with max sp .
you will see it will say smt like 14561253312 exp earned etc
if u spend some sp and kill a mob
you will get the bonus
1235509094 exp bonus (1231241) exp
i have no idea why sp is related
but maybe it bugs the vitality bonuses?
i have no idea

This issue could be fixed after last update.