{"action":"created","issue":{"url":"https://api.github.com/repos/PaperMC/Paper/issues/1208","repository_url":"https://api.github.com/repos/PaperMC/Paper","labels_url":"https://api.github.com/repos/PaperMC/Paper/issues/1208/labels{/name}","comments_url":"https://api.github.com/repos/PaperMC/Paper/issues/1208/comments","events_url":"https://api.github.com/repos/PaperMC/Paper/issues/1208/events","html_url":"https://github.com/PaperMC/Paper/issues/1208","id":341289378,"node_id":"MDU6SXNzdWUzNDEyODkzNzg=","number":1208,"title":"Mobs vanishing when going from build 1468 to 1500","user":{"login":"LogGits","id":26944626,"node_id":"MDQ6VXNlcjI2OTQ0NjI2","avatar_url":"https://avatars1.githubusercontent.com/u/26944626?v=4","gravatar_id":"","url":"https://api.github.com/users/LogGits","html_url":"https://github.com/LogGits","followers_url":"https://api.github.com/users/LogGits/followers","following_url":"https://api.github.com/users/LogGits/following{/other_user}","gists_url":"https://api.github.com/users/LogGits/gists{/gist_id}","starred_url":"https://api.github.com/users/LogGits/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/LogGits/subscriptions","organizations_url":"https://api.github.com/users/LogGits/orgs","repos_url":"https://api.github.com/users/LogGits/repos","events_url":"https://api.github.com/users/LogGits/events{/privacy}","received_events_url":"https://api.github.com/users/LogGits/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":7,"created_at":"2018-07-15T03:40:26Z","updated_at":"2018-07-18T03:20:50Z","closed_at":"2018-07-15T03:52:23Z","author_association":"NONE","body":"Going from build 1468 to 1499 causes mobs to vanish. I have no idea how to reproduce this.\r\n\r\nI just teleported into an unloaded chunk (an offline users base) and all their mobs are gone.\r\n\r\nWas also mentioned in #1199.\r\n\r\nThough i suspect it could be related to StackMob as:\r\n- Villagers\r\n- Some named mobs\r\n- Llamas with carpet on them\r\n- Horses types\r\n\r\nThings that didn't vanish:\r\n- Cows\r\n- Pigs\r\n- Chickens\r\n- Sheep (including coloured)\r\n\r\nAs I mentioned before i don't think this is related to PaperSpigot, I am just writing this to ask if anything relating to entity checks changed that could have affected StackMob to break this. Once again, I am not entirely sure as to the cause of the vanishing mobs, I am just trying to get as much info as I can to resolve my issue.\r\n\r\n**EDIT: It is not caused by stackmob. I did a test with stackmob disabled and still lost mobs.**\r\n\r\n### Plugin list:\r\nAAC, ChatControl pro, Citizens, CommandNPC, DeluxeMenus, Essentials, FastAsyncWorldEdit, HolographicDisplays, LeaderHeads, LiteBans, LuckPerms, PlaceholderAPI, ProtocolLib, Vault, WorldEdit, WorldGuard, WorldGuardExtraFlags, StackMob, CMI, React.\r\n\r\n### Paper build number:\r\n1499\r\n"},"comment":{"url":"https://api.github.com/repos/PaperMC/Paper/issues/comments/405796468","html_url":"https://github.com/PaperMC/Paper/issues/1208#issuecomment-405796468","issue_url":"https://api.github.com/repos/PaperMC/Paper/issues/1208","id":405796468,"node_id":"MDEyOklzc3VlQ29tbWVudDQwNTc5NjQ2OA==","user":{"login":"LogGits","id":26944626,"node_id":"MDQ6VXNlcjI2OTQ0NjI2","avatar_url":"https://avatars1.githubusercontent.com/u/26944626?v=4","gravatar_id":"","url":"https://api.github.com/users/LogGits","html_url":"https://github.com/LogGits","followers_url":"https://api.github.com/users/LogGits/followers","following_url":"https://api.github.com/users/LogGits/following{/other_user}","gists_url":"https://api.github.com/users/LogGits/gists{/gist_id}","starred_url":"https://api.github.com/users/LogGits/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/LogGits/subscriptions","organizations_url":"https://api.github.com/users/LogGits/orgs","repos_url":"https://api.github.com/users/LogGits/repos","events_url":"https://api.github.com/users/LogGits/events{/privacy}","received_events_url":"https://api.github.com/users/LogGits/received_events","type":"User","site_admin":false},"created_at":"2018-07-18T03:20:50Z","updated_at":"2018-07-18T03:20:50Z","author_association":"NONE","body":"Yeah it happens on 1500. At first everything seemed fine, then i hopped offline and a few players were playing and spammed me in discord telling me that their mobs vanished. I joined and they did indeed vanish.\r\n\r\nA user let me use their base as a test for 1491+ (a constant). I would replace their mobs after they vanished. I replaced them before 1500 update. Mobs were still there, nothing was affecting them while i was on roaming around. Then after I went offline players reported that the mobs vanished. I checked and they did vanish, even in the test base.\r\n\r\nI don't know what is the latest safe build to use, but i was previously on 1468 and i didn't want to test with any newer versions incase it happens again. Hence, this is the reason i got back to 1468.\r\n\r\nI have a hypothesis, (could be wrong), I have two plugins that i think *could* be causing it. React and StackMob. My theory is that StackMob could be failing a check to stack the mob and then deleting the mob. The other theory is that React could be messing with chunks and entity loading (not sure about this theory)."}}
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