Messages ending in \ cause error

[EbonJaeger]

When a player on the game server sends a chat message ending in a backslash (not forward slash), an error is thrown and the message does not reach the Discord server. Here is a snippet of my server log with an example of this:

[15:27:17] [Event Dispatcher Handler/INFO]: [Discord] EbonJaeger» hey do messages with a <backslash> at the end still break?

[15:27:28] [Async Chat Thread - #10/ERROR]: Could not pass event AsyncPlayerChatEvent to DiscordMC v1.4.12
org.bukkit.event.EventException
	at org.bukkit.plugin.EventExecutor$1.execute(EventExecutor.java:46) ~[patched_1.11.2.jar:git-Paper-1029]
	at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:74) ~[patched_1.11.2.jar:git-Paper-1029]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[patched_1.11.2.jar:git-Paper-1029]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:517) [patched_1.11.2.jar:git-Paper-1029]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:499) [patched_1.11.2.jar:git-Paper-1029]
	at net.minecraft.server.v1_11_R1.PlayerConnection.chat(PlayerConnection.java:1299) [patched_1.11.2.jar:git-Paper-1029]
	at net.minecraft.server.v1_11_R1.PlayerConnection.a(PlayerConnection.java:1214) [patched_1.11.2.jar:git-Paper-1029]
	at net.minecraft.server.v1_11_R1.PacketPlayInChat$1.run(PacketPlayInChat.java:39) [patched_1.11.2.jar:git-Paper-1029]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_121]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_121]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_121]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_121]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
Caused by: java.lang.IllegalArgumentException: character to be escaped is missing
	at java.util.regex.Matcher.appendReplacement(Matcher.java:809) ~[?:1.8.0_121]
	at java.util.regex.Matcher.replaceAll(Matcher.java:955) ~[?:1.8.0_121]
	at java.lang.String.replaceAll(String.java:2223) ~[?:1.8.0_121]
	at eu.manuelgu.discordmc.listener.ChatListener.onAsyncPlayerChat(ChatListener.java:59) ~[?:?]
	at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor85.execute(Unknown Source) ~[?:?]
	at org.bukkit.plugin.EventExecutor$1.execute(EventExecutor.java:44) ~[patched_1.11.2.jar:git-Paper-1029]
	... 12 more
[15:27:28] [Async Chat Thread - #10/INFO]: [SMod] Hotasflames» lets find out<backslash>

Messages with a backslash in other spots do not cause this error, though the slash character is stripped from the message in the Discord channel. Likewise it will be stripped from a message from Discord to the Minecraft server. I'm not sure if this is intended behavior, however.