Don't set stop to false

runelite-client/src/main/java/net/runelite/client/chat/ChatCommandManager.java

@@ -151,12 +151,10 @@ public class ChatCommandManager
 		}
 
 		BiPredicate<ChatInput, String> input = chatCommand.getInput();
-		if (input == null)
+		if (input != null && input.test(chatInput, message))
 		{
-			return;
+			chatInput.setStop();
 		}
-
-		chatInput.setStop(input.test(chatInput, message));
 	}
 
 	private static String extractCommand(String message)

runelite-client/src/main/java/net/runelite/client/events/ChatInput.java

@@ -25,14 +25,17 @@
 package net.runelite.client.events;
 
 import lombok.Getter;
-import lombok.Setter;
 import net.runelite.api.events.Event;
 
 public abstract class ChatInput implements Event
 {
 	@Getter
-	@Setter
 	private boolean stop = false;
 
+	public void setStop()
+	{
+		this.stop = true;
+	}
+
 	public abstract void resume();
 }

runelite-client/src/main/java/net/runelite/client/plugins/twitch/TwitchPlugin.java

@@ -219,6 +219,6 @@ public class TwitchPlugin extends Plugin implements TwitchListener
 			addChatMessage(twitchConfig.username(), message);
 		}
 
-		chatboxInput.setStop(true);
+		chatboxInput.setStop();
 	}
 }