Big permormance issue

[myfbone]

Sometimes some performance issues can occur, e.g. some player can start to get a lot of errors (see it in console) and there is this in my timings I have thing that doesn't allow spawner rewards, so I do not understand why they are getting that many rewards:

I just removed all rewards that was giving iron and gold ingots to players, it was mostly mules, horses, fishes, that stuff which I did not change from defaults. All hostile mobs have custom thing to give. Mb it's normal, but there is some tps drop during reward giving

[myfbone]

На сервере запущена 'MobHunting 6.8.9'.