Mobs Drop Leashes

When killing a mob with a weapon from Playstation 4 Edition in Minecraft Bedrock, Mobs drop leashes ( even tho the mobs are not leashed )

I think this is due to the fact that weapons back in Playstation 4 Edition could be enchanted with any enchantment, I think this can be fixed if you make a code that will remove enchantments that are not supposed to be on an item. If that won't work then I don't know what can fix it.