I've read 2 threads about this particular bug but it doesn't seem to be fixed yet. The skill 'Energy Blast' which is a 3rd job Marauder skill feels quite delayed from what it is meant to be. Normally it was a smooth spammable skill but now there is around 1 second delay between using it. If you watch videos with Energy Blast in and test it in MapleRoyals you can see there is a quite a difference.
GMS v62 is the first version with Pirate Job. And the skill working correct, delayed, damage, etc. its not a bug.