there are allot of names for one thing but all we know is each name has a different meaning like missing chunks which are no longer possible to get in current day Minecraft and are mostly client side, chunk discontinuity is server side and can majorly effect performance and the world itself since there is no going back without a back-up file and btw never play on the same world when changing versions its a bad habit and it leads to these things happening now we can go to the more present day version of it which is the hardware chunks so basically they only happen on full Hard drive and they are the most major a "chunk error" could get because even rejoining the world makes it worse [for a better example i'd rather watch antvenom to know about the hardware one because of how confusing it gets