SignChangeEvent StringIndexOutOfBoundsException: begin 6, end 5, length 19

[mibby]

[05:34:41] [Server thread/ERROR]: Could not pass event SignChangeEvent to EmojiChat v1.8.3
java.lang.StringIndexOutOfBoundsException: begin 6, end 5, length 19
	at java.lang.String.checkBoundsBeginEnd(String.java:3756) ~[?:?]
	at java.lang.String.substring(String.java:1902) ~[?:?]
	at io.github.radbuilder.emojichat.utils.EmojiHandler.translateShorthand(EmojiHandler.java:311) ~[?:?]
	at io.github.radbuilder.emojichat.EmojiChatListener.onSignChange(EmojiChatListener.java:107) ~[?:?]
	at com.destroystokyo.paper.event.executor.MethodHandleEventExecutor.execute(MethodHandleEventExecutor.java:37) ~[patched_1.15.2.jar:git-Paper-184]
	at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:76) ~[patched_1.15.2.jar:git-Paper-184]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.15.2.jar:git-Paper-184]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:607) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.PlayerConnection.a(PlayerConnection.java:2586) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.PacketPlayInUpdateSign.a(SourceFile:44) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.PacketPlayInUpdateSign.a(SourceFile:10) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:23) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.TickTask.run(SourceFile:18) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.MinecraftServer.ba(MinecraftServer.java:1059) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.MinecraftServer.executeNext(MinecraftServer.java:1052) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.MinecraftServer.sleepForTick(MinecraftServer.java:1022) ~[patched_1.15.2.jar:git-Paper-184]
	at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:945) ~[patched_1.15.2.jar:git-Paper-184]
	at java.lang.Thread.run(Thread.java:832) [?:?]