Several times in Skyblock I have been disconnected and when I reconnect my inv has been cleared.
Sometimes I have been able to fix this by going to the hub and warping back and it magically reappears.

Today that trick didn't work and another player was also complaining about it in chat.

There were some nullpointers in the log.
Are you able to roll back my inv?

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[22:45:43] [client thread/info]: [chat] Logged-in due to Session Reconnection. [22:45:43] [client thread/info]: [chat] You are now logged in! [22:45:49] [client thread/fatal]: Error executing task java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: Default value cannot be lower than minimum value! at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_112] at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_112] at net.minecraft.util.Util.func_181617_a(SourceFile:47) [h.class:?] at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1046) [bes.class:?] at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:372) [bes.class:?] at net.minecraft.client.main.Main.main(SourceFile:124) [main.class:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_112] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_112] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_112] at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_112] at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?] at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?] Caused by: java.lang.IllegalArgumentException: Default value cannot be lower than minimum value! at net.minecraft.entity.ai.attributes.RangedAttribute.<init>(SourceFile:21) ~[tq.class:?] at net.minecraft.client.network.NetHandlerPlayClient.func_147290_a(NetHandlerPlayClient.java:2042) ~[bno.class:?] at net.minecraft.network.play.server.SPacketEntityProperties.func_148833_a(SourceFile:70) ~[ik.class:?] at net.minecraft.network.play.server.SPacketEntityProperties.func_148833_a(SourceFile:15) ~[ik.class:?] at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) ~[fo$1.class:?] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_112] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_112] at net.minecraft.util.Util.func_181617_a(SourceFile:46) ~[h.class:?] ... 9 more [22:45:49] [client thread/info]: [chat] opticyclic joined the game [22:45:50] [client thread/fatal]: Error executing task java.util.concurrent.ExecutionException: java.lang.IllegalArgumentException: Default value cannot be lower than minimum value! at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_112] at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_112] at net.minecraft.util.Util.func_181617_a(SourceFile:47) [h.class:?] at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1046) [bes.class:?] at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:372) [bes.class:?] at net.minecraft.client.main.Main.main(SourceFile:124) [main.class:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_112] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_112] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_112] at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_112] at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?] at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?] Caused by: java.lang.IllegalArgumentException: Default value cannot be lower than minimum value! at net.minecraft.entity.ai.attributes.RangedAttribute.<init>(SourceFile:21) ~[tq.class:?] at net.minecraft.client.network.NetHandlerPlayClient.func_147290_a(NetHandlerPlayClient.java:2042) ~[bno.class:?] at net.minecraft.network.play.server.SPacketEntityProperties.func_148833_a(SourceFile:70) ~[ik.class:?] at net.minecraft.network.play.server.SPacketEntityProperties.func_148833_a(SourceFile:15) ~[ik.class:?] at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) ~[fo$1.class:?] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_112] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_112] at net.minecraft.util.Util.func_181617_a(SourceFile:46) ~[h.class:?] ... 9 more [22:45:59] [client thread/info]: [chat] <JoytheDerpychild> aHAHA [22:45:59] [client thread/info]: [chat] <RagedEclipse> snoopy c: [22:45:59] [client thread/info]: [chat] [discord | linked] TheMiner257: where meh dicord vip role???? [22:45:59] [client thread/info]: [chat] [discord | discord mod] ˢⁿººᵖʸᵇºʸ₃₃₁: Oy [22:45:59] [client thread/info]: [chat] <JoytheDerpychild> i used to go to those schools [22:45:59] [client thread/info]: [chat] [discord | owner] Jack In The Box: cancer indeed [22:45:59] [client thread/info]: [chat] You have been warped to skyblock [22:46:04] [client thread/info]: [chat] Skaia > You get 1,652 Game-Money if you vote at /vote [22:46:04] [client thread/fatal]: Error executing task java.util.concurrent.ExecutionException: java.lang.NullPointerException at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_112] at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_112] at net.minecraft.util.Util.func_181617_a(SourceFile:47) [h.class:?] at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1046) [bes.class:?] at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:372) [bes.class:?] at net.minecraft.client.main.Main.main(SourceFile:124) [main.class:?] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_112] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_112] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_112] at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_112] at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?] at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?] Caused by: java.lang.NullPointerException at net.minecraft.scoreboard.Scoreboard.func_96511_d(SourceFile:228) ~[bec.class:?] at net.minecraft.client.network.NetHandlerPlayClient.func_147247_a(NetHandlerPlayClient.java:1974) ~[bno.class:?] at net.minecraft.network.play.server.SPacketTeams.func_148833_a(SourceFile:117) ~[ia.class:?] at net.minecraft.network.play.server.SPacketTeams.func_148833_a(SourceFile:13) ~[ia.class:?] at net.minecraft.network.PacketThreadUtil$1.run(SourceFile:13) ~[fo$1.class:?] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_112] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_112] at net.minecraft.util.Util.func_181617_a(SourceFile:46) ~[h.class:?] ... 9 more [22:46:04] [client thread/info]: [chat] Skaia > Welcome back!