Describe the bug
Complete server crash when trying to run a report with Dynviewdist mod.

To Reproduce
install latest laggoggles and dynviewdist, then run a report

If you are using SpongeForge, which version are you using?
aaaspongeforge-1.12.2-2838-7.2.0

CAN CONFIRM RUNNING A REPORT AFTER DISABLING DYNVIEWDIST WORKS COMPLETELY FINE.

If you used the word 'error' somewhere, always provide the stack trace along with both debug.log and latest.log
---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 2020-04-27 00:19:33 CEST
Description: Exception in server tick loop

java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445)
at java.util.HashMap$EntryIterator.next(HashMap.java:1479)
at java.util.HashMap$EntryIterator.next(HashMap.java:1477)
at net.minecraftforge.fml.common.eventhandler.EventBus.redirect$zpi000$forgeImpl$updateListenerRegistry(EventBus.java:817)
at net.minecraftforge.fml.common.eventhandler.EventBus.unregister(EventBus.java:168)
at com.github.terminatornl.laggoggles.util.RunInServerThread.onServerTick(RunInServerThread.java:18)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_1753_RunInServerThread_onServerTick_ServerTickEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.forgeBridge$post(EventBus.java:753)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:703)
at net.minecraftforge.fml.common.FMLCommonHandler.onPreServerTick(FMLCommonHandler.java:279)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:657)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
at java.lang.Thread.run(Thread.java:748)

If you used the word 'error' somewhere, always provide the stack trace along with both debug.log and latest.log