I don't know how long this problem has been, but the creepers don't explode. And this problem only in bskyblock_worlds.

The issue is related to the description of those flags that do not properly explain what they're doing.
Ah but flags description its true look this:
CREEPER_DAMAGE:
description: Toggle creeper damage
name: Creeper damage
CREEPER_GRIEFING:
description: Toggle creeper griefing
name: Creeper griefing
hint: No creeper griefing allowed
CREEPER_DAMAGE: #This mean creeper can give damage another entitys or players when explode
description: Creeper hasar谋n谋 de臒i艧.
name: Creeper hasar谋
CREEPER_GRIEFING: #This mean creeper can break blocks when explode
description: Creeper patlamas谋n谋 de臒i艧.
name: Creeper patlamas谋
hint: Creeper patlama hasar谋 yoktur.
No, it's not. CREEPER_GRIEFING only prevents creepers from destroying the blocks if and only if said creeper was ignited by a visitor.
Can you look this? Always block breaking. or not explode
https://streamable.com/rywph