I like a lot this plugin but sometimes items go to one slot that has already an item and the item that was there goes to my inventory. I have searched every single config.yml. This is pretty annoying especially when you play Minecraft survival. I have searched almost every file of my server and can't find a plugin as good as this can anyone help me fix that???
You can ask if you want any info!
Mc server version 1.16.5 Spigot

/mv version -p output

[20:50:43] [Server thread/INFO]: [Multiverse-Core] Multiverse-Core Version: 4.2.2-b812
[20:50:43] [Server thread/INFO]: [Multiverse-Core] Bukkit Version: 2991-Spigot-018b9a0-f3f3094 (MC: 1.16.5)
[20:50:43] [Server thread/INFO]: [Multiverse-Core] Loaded Worlds: [{"MVWorld@26308910":{"Gen":"null","Type":"NORMAL","Env":"THE_END","Name":"world_the_end"}}, {"MVWorld@17859854":{"Gen":"null","Type":"FLAT","Env":"NORMAL","Name":"world"}}, {"MVWorld@26807582":{"Gen":"null","Type":"FLAT","Env":"NORMAL","Name":"Creative"}}, {"MVWorld@2221124":{"Gen":"null","Type":"NORMAL","Env":"NETHER","Name":"world_nether"}}, {"MVWorld@23455837":{"Gen":"null","Type":"NORMAL","Env":"NORMAL","Name":"Manhunt"}}, {"MVWorld@9156820":{"Gen":"null","Type":"NORMAL","Env":"NORMAL","Name":"ANARCHY"}}]
[20:50:43] [Server thread/INFO]: [Multiverse-Core] Multiverse Plugins Loaded: 2
[20:50:43] [Server thread/INFO]: [Multiverse-Core] Economy being used: Simple Item Economy
[20:50:43] [Server thread/INFO]: [Multiverse-Core] Permissions Plugin: Bukkit Permissions (SuperPerms)
[20:50:43] [Server thread/INFO]: [Multiverse-Core] Dumping Config Values: (version 2.9)
[20:50:43] [Server thread/INFO]: [Multiverse-Core] enforceaccess: false
[20:50:43] [Server thread/INFO]: [Multiverse-Core] prefixchat: true
[20:50:43] [Server thread/INFO]: [Multiverse-Core] prefixchatformat: [%world%]%chat%
[20:50:43] [Server thread/INFO]: [Multiverse-Core] useasyncchat: true
[20:50:43] [Server thread/INFO]: [Multiverse-Core] teleportintercept: true
[20:50:43] [Server thread/INFO]: [Multiverse-Core] firstspawnoverride: true
[20:50:43] [Server thread/INFO]: [Multiverse-Core] displaypermerrors: true
[20:50:43] [Server thread/INFO]: [Multiverse-Core] globaldebug: 0
[20:50:43] [Server thread/INFO]: [Multiverse-Core] silentstart: false
[20:50:43] [Server thread/INFO]: [Multiverse-Core] messagecooldown: 5000
[20:50:43] [Server thread/INFO]: [Multiverse-Core] version: 2.9
[20:50:43] [Server thread/INFO]: [Multiverse-Core] firstspawnworld: world
[20:50:43] [Server thread/INFO]: [Multiverse-Core] teleportcooldown: 1000
[20:50:43] [Server thread/INFO]: [Multiverse-Core] defaultportalsearch: false
[20:50:43] [Server thread/INFO]: [Multiverse-Core] portalsearchradius: 128
[20:50:43] [Server thread/INFO]: [Multiverse-Core] autopurge: false
[20:50:43] [Server thread/INFO]: [Multiverse-Core] Special Code: FRN002
[20:50:43] [Server thread/INFO]: [Multiverse-Portals] Multiverse-Portals Version: 4.2.1-b834
[20:50:43] [Server thread/INFO]: [Multiverse-Portals] Loaded Portals: 8
[20:50:43] [Server thread/INFO]: [Multiverse-Portals] Dumping Portal Values: (version 2.7)
[20:50:43] [Server thread/INFO]: [Multiverse-Portals] wand: 255
[20:50:43] [Server thread/INFO]: [Multiverse-Portals] useonmove: true
[20:50:43] [Server thread/INFO]: [Multiverse-Portals] portalsdefaulttonether: false
[20:50:43] [Server thread/INFO]: [Multiverse-Portals] enforceportalaccess: false
[20:50:43] [Server thread/INFO]: [Multiverse-Portals] portalcooldown: 1000
[20:50:43] [Server thread/INFO]: [Multiverse-Portals] clearonremove: false
[20:50:43] [Server thread/INFO]: [Multiverse-Portals] framematerials: []
[20:50:43] [Server thread/INFO]: [Multiverse-Portals] Special Code: FRN001
[20:50:43] [Server thread/INFO]: [Multiverse-Inventories] Multiverse-Inventories Version: 4.2.2-b500
[20:50:43] [Server thread/INFO]: [Multiverse-Inventories] === Settings ===
[20:50:43] [Server thread/INFO]: [Multiverse-Inventories] First Run: false
[20:50:43] [Server thread/INFO]: [Multiverse-Inventories] Using Bypass: false
[20:50:43] [Server thread/INFO]: [Multiverse-Inventories] Default Ungrouped Worlds: false
[20:50:43] [Server thread/INFO]: [Multiverse-Inventories] Save and Load on Log In and Out: false
[20:50:43] [Server thread/INFO]: [Multiverse-Inventories] Using GameMode Profiles: false
[20:50:43] [Server thread/INFO]: [Multiverse-Inventories] === Shares ===
[20:50:43] [Server thread/INFO]: [Multiverse-Inventories] Optionals for Ungrouped Worlds: true
[20:50:43] [Server thread/INFO]: [Multiverse-Inventories] Enabled Optionals:
[20:50:43] [Server thread/INFO]: [Multiverse-Inventories] === Groups ===
[20:50:43] [Server thread/INFO]: [Multiverse-Inventories] default: {Worlds: [world, world_the_end, world_nether], Shares: [hit_points, economy, food_level, saturation, exhaustion, xp, total_xp, lvl, inventory_contents, armor_contents, bed_spawn, maximum_air, remaining_air, fall_distance, fire_ticks, potion_effects, last_location, ender_chest, off_hand]}

Look at the full here: https://j.mp/39EvJkX

Reproduce
I warp to the world named Manhunt. Then I mine any blocks or use my pickaxe if i want the pickaxe to glitch. This doesn't happen every single time but sometimes, the blocks ( or pickaxe ) you pickaxe or blocks go to one slot and can not be moved anywhere You can only drop them. ( This works only in the world named manhuntand works for hotbar slots 1 and 9!!!)

I couldn't take a screenshot so i made a video about it:
https://user-images.githubusercontent.com/81814773/113441214-92427980-93f6-11eb-9432-ddbe7034cb15.mp4

As you can see in the video, i am not able to move the pickaxe from the first slot to my inventory. It is just stick to the first slot of the hotbar!

Please help me fix that because the server I am using isn't working well and i hope i will be able to fix it as soon as possible!
If you need something else just ask!

While I was playing i found this error can it help???

[22:28:14] [pool-52-thread-1/ERROR]: Cannot load plugins\Multiverse-Inventories\worlds\Manhunt\DUCKY2008.json
org.bukkit.configuration.InvalidConfigurationException: Invalid JSON detected.
at com.onarandombox.multiverseinventories.utils.configuration.json.JsonConfiguration.loadFromString(JsonConfiguration.java:62) ~[?:?]
at org.bukkit.configuration.file.FileConfiguration.load(FileConfiguration.java:160) ~[spigot-1.16.5.jar:2991-Spigot-018b9a0-f3f3094]
at org.bukkit.configuration.file.FileConfiguration.load(FileConfiguration.java:128) ~[spigot-1.16.5.jar:2991-Spigot-018b9a0-f3f3094]
at com.onarandombox.multiverseinventories.utils.configuration.json.JsonConfiguration.loadConfiguration(JsonConfiguration.java:110) [Multiverse-Inventories-4.2.2%20(1).jar:?]
at com.onarandombox.multiverseinventories.utils.configuration.json.JsonConfiguration.loadConfiguration(JsonConfiguration.java:131) [Multiverse-Inventories-4.2.2%20(1).jar:?]
at com.onarandombox.multiverseinventories.FlatFileProfileDataSource.getConfigHandleNow(FlatFileProfileDataSource.java:96) [Multiverse-Inventories-4.2.2%20(1).jar:?]
at com.onarandombox.multiverseinventories.FlatFileProfileDataSource.processProfileWrite(FlatFileProfileDataSource.java:199) [Multiverse-Inventories-4.2.2%20(1).jar:?]
at com.onarandombox.multiverseinventories.FlatFileProfileDataSource.access$300(FlatFileProfileDataSource.java:37) [Multiverse-Inventories-4.2.2%20(1).jar:?]
at com.onarandombox.multiverseinventories.FlatFileProfileDataSource$FileWriter.call(FlatFileProfileDataSource.java:190) [Multiverse-Inventories-4.2.2%20(1).jar:?]
at com.onarandombox.multiverseinventories.FlatFileProfileDataSource$FileWriter.call(FlatFileProfileDataSource.java:181) [Multiverse-Inventories-4.2.2%20(1).jar:?]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_291]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_291]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_291]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_291]
Caused by: com.onarandombox.multiverseinventories.util.json.parser.ParseException: Unexpected token at position 2469.
at com.onarandombox.multiverseinventories.util.json.parser.JSONParserBase.readObject(JSONParserBase.java:430) ~[?:?]
at com.onarandombox.multiverseinventories.util.json.parser.JSONParserBase.readMain(JSONParserBase.java:303) ~[?:?]
at com.onarandombox.multiverseinventories.util.json.parser.JSONParserBase.parse(JSONParserBase.java:154) ~[?:?]
at com.onarandombox.multiverseinventories.util.json.parser.JSONParserString.parse(JSONParserString.java:55) ~[?:?]
at com.onarandombox.multiverseinventories.util.json.parser.JSONParserString.parse(JSONParserString.java:37) ~[?:?]
at com.onarandombox.multiverseinventories.util.json.parser.JSONParser.parse(JSONParser.java:135) ~[?:?]
at com.onarandombox.multiverseinventories.utils.configuration.json.JsonConfiguration.loadFromString(JsonConfiguration.java:60) ~[?:?]
... 13 more