Please add worldchange check, because I have two type of world can kill mob.
Example, easy world and ExtraHard mode, players can killstreak in easy world,
then go to ExtradHard mode get more rewards

Thank you for creating a ticket, this helps me keeping track of the open tickets and makes sure that I don't forget something.

I have work some hours today on this, it was not as easy as I thought :-( but I think it works now.

Please help me with the testing.

You will need to test killstreaks in general, I had to do more changes than just listen for a PlayerWorldChangeEvent.

Please try buld 436 or newer on my Jenkins server:
https://fractal.lindegaard.one:8181/job/MobHunting

This should be fixed in v5.0.2