It seems like ProtocolLib might be causing some issues when receiving dig packets, but I'm by no means knowledgeable in Java stack traces. A few of these errors were sent in the server console regarding block breaking and break abortion packets before it stopped responding and effectively crashed.
[21:29:22 ERROR]: [AnarchyExploitFixes] Unhandled exception occured in onPacketReceiving(PacketEvent) for AnarchyExploitFixes
java.lang.NullPointerException: Cannot invoke "org.bukkit.entity.Player.getLocation()" because the return value of "com.comphenix.protocol.events.PacketEvent.getPlayer()" is null
at me.moomoo.anarchyexploitfixes.patches.ProtocolLib$4.onPacketReceiving(ProtocolLib.java:135) ~[anarchyexploitfixes-1.25.1.jar:?]
at com.comphenix.protocol.injector.SortedPacketListenerList.invokeReceivingListener(SortedPacketListenerList.java:114) ~[ProtocolLib.jar:?]
at com.comphenix.protocol.injector.SortedPacketListenerList.invokePacketRecieving(SortedPacketListenerList.java:67) ~[ProtocolLib.jar:?]
at com.comphenix.protocol.injector.PacketFilterManager.handlePacket(PacketFilterManager.java:537) ~[ProtocolLib.jar:?]
at com.comphenix.protocol.injector.PacketFilterManager.invokePacketRecieving(PacketFilterManager.java:509) ~[ProtocolLib.jar:?]
at com.comphenix.protocol.injector.netty.ProtocolInjector.packetReceived(ProtocolInjector.java:360) ~[ProtocolLib.jar:?]
at com.comphenix.protocol.injector.netty.ProtocolInjector.onPacketReceiving(ProtocolInjector.java:325) ~[ProtocolLib.jar:?]
at com.comphenix.protocol.injector.netty.ChannelInjector.decode(ChannelInjector.java:600) ~[ProtocolLib.jar:?]
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:507) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:446) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at com.comphenix.protocol.injector.netty.ChannelInjector$2.channelRead(ChannelInjector.java:292) ~[ProtocolLib.jar:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:311) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:432) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:276) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.handler.flush.FlushConsolidationHandler.channelRead(FlushConsolidationHandler.java:152) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:795) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:480) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-all-4.1.68.Final.jar:4.1.68.Final]
at java.lang.Thread.run(Thread.java:833) ~[?:?]
[21:29:22 ERROR]: Parameters:
net.minecraft.network.protocol.game.PacketPlayInBlockDig@3fd771e5[
a=BlockPosition{x=2959741, y=71, z=-118255}
b=south
c=START_DESTROY_BLOCK
]
[21:29:22 ERROR]: [AnarchyExploitFixes] Unhandled exception occured in onPacketReceiving(PacketEvent) for AnarchyExploitFixes
This isn't on every dig packet, but (seemingly?) randomly happened.