there is a problem with the particle in pmmp ver 1.14 where the particle is sometimes confused with other particles, and it makes me very confused to make something from it
What kind of particles are you talking about? Minecraft has lots of them! Do you mean like the particles from potion effects, or when you run, or one of the many others?
I think this was fixed in version 3.11.2: https://github.com/pmmp/PocketMine-MP/blob/3.11.2/changelogs/3.11.md#3112