Specifically in Conquest fights, pearls failing can be a mostly unforeseeable, yet enormous issue during combat. It is particularly evident when fights occur in former towns, or unique terrain, where there could be a large amount of blocks to cause pearls to fail. I'm unsure of the Minecraft mechanics that require Loka pearls to sometimes fail - but I am wondering if there could be a workaround to this, at least during Conquest fights. It can be extremely frustrating during fights to have your pearl fail, and although it isn't that likely, I am suggesting to at least look into ways to prevent this.