Server crashes when trying to exit a newly created portal in the Nether to exit onto a previously not rendered part of the world. Crash report follows.

---- Minecraft Crash Report -------- Minecraft Crash Report ----// Shall we play a game?
Time: 27/07/2019, 16:35Description: Watching Server
java.lang.Error at java.base@11.0.3/jdk.internal.misc.Unsafe.park(Native Method) at java.base@11.0.3/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234) at app//agq.bi(SourceFile:139) at app//agq.c(SourceFile:129) at app//vi.a(SourceFile:135) at app//bhr.a(SourceFile:194) at app//bhu.a(SourceFile:106) at app//bhr.c(SourceFile:189) at app//bhr.e_(SourceFile:411) at app//bid.a(SourceFile:103) at app//bid.a(SourceFile:51) at app//vl.a(SourceFile:701) at app//aio.aW(SourceFile:1859) at app//aio.aa(SourceFile:411) at app//aix.aa(SourceFile:288) at app//aio.h(SourceFile:390) at app//aix.h(SourceFile:2046) at app//awg.h(SourceFile:277) at app//vl.i(SourceFile:388) at app//wc.b(SourceFile:196) at app//jc.a(SourceFile:234) at app//wb.c(SourceFile:171) at app//net.minecraft.server.MinecraftServer.b(SourceFile:847) at app//uk.b(SourceFile:343) at app//net.minecraft.server.MinecraftServer.a(SourceFile:774) at app//net.minecraft.server.MinecraftServer.run(SourceFile:642) at java.base@11.0.3/java.lang.Thread.run(Thread.java:834)

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
– Head --Thread: Server WatchdogStacktrace: at java.base@11.0.3/jdk.internal.misc.Unsafe.park(Native Method) at java.base@11.0.3/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234) at app//agq.bi(SourceFile:139) at app//agq.c(SourceFile:129) at app//vi.a(SourceFile:135) at app//bhr.a(SourceFile:194) at app//bhu.a(SourceFile:106) at app//bhr.c(SourceFile:189) at app//bhr.e_(SourceFile:411) at app//bid.a(SourceFile:103) at app//bid.a(SourceFile:51) at app//vl.a(SourceFile:701) at app//aio.aW(SourceFile:1859) at app//aio.aa(SourceFile:411) at app//aix.aa(SourceFile:288) at app//aio.h(SourceFile:390) at app//aix.h(SourceFile:2046) at app//awg.h(SourceFile:277) at app//vl.i(SourceFile:388) at app//wc.b(SourceFile:196) at app//jc.a(SourceFile:234) at app//wb.c(SourceFile:171) at app//net.minecraft.server.MinecraftServer.b(SourceFile:847) at app//uk.b(SourceFile:343) at app//net.minecraft.server.MinecraftServer.a(SourceFile:774)
– Thread Dump --Details: Threads: "Reference Handler" daemon prio=10 Id=2 RUNNABLE at java.base@11.0.3/java.lang.ref.Reference.waitForReferencePendingList(Native Method) at java.base@11.0.3/java.lang.ref.Reference.processPendingReferences(Reference.java:241) at java.base@11.0.3/java.lang.ref.Reference$ReferenceHandler.run(Reference.java:213)

"Finalizer" daemon prio=8 Id=3 WAITING on java.lang.ref.ReferenceQueue$Lock@704f1 at java.base@11.0.3/java.lang.Object.wait(Native Method) -  waiting on java.lang.ref.ReferenceQueue$Lock@704f1 at java.base@11.0.3/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155) at java.base@11.0.3/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:176) at java.base@11.0.3/java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:170)

"Signal Dispatcher" daemon prio=9 Id=4 RUNNABLE

"Common-Cleaner" daemon prio=8 Id=9 TIMED_WAITING on java.lang.ref.ReferenceQueue$Lock@c0f781 at java.base@11.0.3/java.lang.Object.wait(Native Method) -  waiting on java.lang.ref.ReferenceQueue$Lock@c0f781 at java.base@11.0.3/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155) at java.base@11.0.3/jdk.internal.ref.CleanerImpl.run(CleanerImpl.java:148) at java.base@11.0.3/java.lang.Thread.run(Thread.java:834) at java.base@11.0.3/jdk.internal.misc.InnocuousThread.run(InnocuousThread.java:134)

"Server-Worker-1" daemon prio=5 Id=13 WAITING on java.util.concurrent.ForkJoinPool@ff6f81 at java.base@11.0.3/jdk.internal.misc.Unsafe.park(Native Method) -  waiting on java.util.concurrent.ForkJoinPool@ff6f81 at java.base@11.0.3/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194) at java.base@11.0.3/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1628) at java.base@11.0.3/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)

"Server-Worker-2" daemon prio=5 Id=14 RUNNABLE at app//com.google.common.cache.LocalCache.connectAccessOrder(LocalCache.java:1933) at app//com.google.common.cache.LocalCache$AccessQueue.offer(LocalCache.java:3980) at app//com.google.common.cache.LocalCache$AccessQueue.offer(LocalCache.java:3938) at java.base@11.0.3/java.util.AbstractQueue.add(AbstractQueue.java:95) at app//com.google.common.cache.LocalCache$Segment.drainRecencyQueue(LocalCache.java:2717) at app//com.google.common.cache.LocalCache$Segment.expireEntries(LocalCache.java:2740) at app//com.google.common.cache.LocalCache$Segment.runLockedCleanup(LocalCache.java:3639) at app//com.google.common.cache.LocalCache$Segment.cleanUp(LocalCache.java:3631) ...
Number of locked synchronizers = 1 - java.util.concurrent.locks.ReentrantLock$NonfairSync@1fdfdba

"Server-Worker-3" daemon prio=5 Id=15 WAITING on java.util.concurrent.ForkJoinPool@ff6f81 at java.base@11.0.3/jdk.internal.misc.Unsafe.park(Native Method) -  waiting on java.util.concurrent.ForkJoinPool@ff6f81 at java.base@11.0.3/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194) at java.base@11.0.3/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1628) at java.base@11.0.3/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)

"Snooper Timer" daemon prio=5 Id=16 WAITING on java.util.TaskQueue@18d4538 at java.base@11.0.3/java.lang.Object.wait(Native Method) -  waiting on java.util.TaskQueue@18d4538 at java.base@11.0.3/java.lang.Object.wait(Object.java:328) at java.base@11.0.3/java.util.TimerThread.mainLoop(Timer.java:527) at java.base@11.0.3/java.util.TimerThread.run(Timer.java:506)

"Server Infinisleeper" daemon prio=5 Id=18 TIMED_WAITING at java.base@11.0.3/java.lang.Thread.sleep(Native Method) at app//uk$1.run(SourceFile:93)

"Server thread" prio=5 Id=17 TIMED_WAITING on java.lang.String@18a3e93 at java.base@11.0.3/jdk.internal.misc.Unsafe.park(Native Method) -  waiting on java.lang.String@18a3e93 at java.base@11.0.3/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234) at app//agq.bi(SourceFile:139) at app//agq.c(SourceFile:129) at app//vi.a(SourceFile:135) at app//bhr.a(SourceFile:194) at app//bhu.a(SourceFile:106) at app//bhr.c(SourceFile:189) ...

"Server console handler" daemon prio=5 Id=20 RUNNABLE (in native) at java.base@11.0.3/java.io.FileInputStream.readBytes(Native Method) at java.base@11.0.3/java.io.FileInputStream.read(FileInputStream.java:279) at java.base@11.0.3/java.io.BufferedInputStream.read1(BufferedInputStream.java:290) at java.base@11.0.3/java.io.BufferedInputStream.read(BufferedInputStream.java:351) -  locked java.io.BufferedInputStream@1d202f5 at java.base@11.0.3/sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284) at java.base@11.0.3/sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326) at java.base@11.0.3/sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178) -  locked java.io.InputStreamReader@eb2bb2 at java.base@11.0.3/java.io.InputStreamReader.read(InputStreamReader.java:185) ...

"DestroyJavaVM" prio=5 Id=21 RUNNABLE

"ObjectCleanerThread" daemon prio=1 Id=22 TIMED_WAITING on java.lang.ref.ReferenceQueue$Lock@ae8538 at java.base@11.0.3/java.lang.Object.wait(Native Method) -  waiting on java.lang.ref.ReferenceQueue$Lock@ae8538 at java.base@11.0.3/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155) at app//io.netty.util.internal.ObjectCleaner$1.run(ObjectCleaner.java:54) at app//io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.base@11.0.3/java.lang.Thread.run(Thread.java:834)

"Netty Server IO #0" daemon prio=5 Id=23 RUNNABLE at java.base@11.0.3/sun.nio.ch.EPoll.wait(Native Method) at java.base@11.0.3/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:120) at java.base@11.0.3/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:124) -  locked sun.nio.ch.Util$2@8e5458 -  locked sun.nio.ch.EPollSelectorImpl@19c3996 at java.base@11.0.3/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:136) at app//io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:756) at app//io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:411) at app//io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884) at java.base@11.0.3/java.lang.Thread.run(Thread.java:834)

"Server Watchdog" daemon prio=5 Id=24 RUNNABLE at java.management@11.0.3/sun.management.ThreadImpl.dumpThreads0(Native Method) at java.management@11.0.3/sun.management.ThreadImpl.dumpAllThreads(ThreadImpl.java:502) at java.management@11.0.3/sun.management.ThreadImpl.dumpAllThreads(ThreadImpl.java:490) at app//un.run(SourceFile:45) at java.base@11.0.3/java.lang.Thread.run(Thread.java:834)

"Netty Server IO #1" daemon prio=5 Id=25 RUNNABLE at java.base@11.0.3/sun.nio.ch.EPoll.wait(Native Method) at java.base@11.0.3/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:120) at java.base@11.0.3/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:124) -  locked sun.nio.ch.Util$2@a92cec -  locked sun.nio.ch.EPollSelectorImpl@10e684 at java.base@11.0.3/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:136) at app//io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:756) at app//io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:411) at app//io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884) at java.base@11.0.3/java.lang.Thread.run(Thread.java:834)

Stacktrace: at un.run(SourceFile:61) at java.base/java.lang.Thread.run(Thread.java:834)
– System Details --Details: Minecraft Version: 1.14.4 Minecraft Version ID: 1.14.4 Operating System: Linux (arm) version 4.19.50-v7l+ Java Version: 11.0.3, Raspbian Java VM Version: OpenJDK Server VM (mixed mode), Raspbian Memory: 337040208 bytes (321 MB) / 1073741824 bytes (1024 MB) up to 2147483648 bytes (2048 MB) CPUs: 4 JVM Flags: 2 total; -Xms1G -Xmx2G Player Count: 1 / 20; [vl['Perzec'/204, l='Nefrin', x=5283.79, y=77.00, z=-1500.56]] Data Packs: vanilla, file/bukkit (incompatible) Is Modded: Unknown (can't tell) Type: Dedicated Server (map_server.txt)