Add a temporary patch for Chat message validation failed

src/main/java/land/chipmunk/chipmunkmod/mixin/ClientConnectionMixin.java

@@ -0,0 +1,18 @@
+package land.chipmunk.chipmunkmod.mixin;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import net.minecraft.client.network.ClientPlayNetworkHandler;
+import net.minecraft.text.Text;
+
+@Mixin(net.minecraft.network.ClientConnection.class)
+public class ClientConnectionMixin {
+  @Inject(at = @At("HEAD"), method = "disconnect", cancellable = true)
+  public void disconnect (Text disconnectReason, CallbackInfo ci) {
+    if (disconnectReason == ClientPlayNetworkHandlerAccessor.chatValidationFailedText()) {
+      ci.cancel();
+    }
+  }
+}

src/main/java/land/chipmunk/chipmunkmod/mixin/ClientPlayNetworkHandlerAccessor.java

@@ -0,0 +1,11 @@
+package land.chipmunk.chipmunkmod.mixin;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+import net.minecraft.text.Text;
+
+@Mixin(net.minecraft.client.network.ClientPlayNetworkHandler.class)
+public interface ClientPlayNetworkHandlerAccessor {
+  @Accessor("CHAT_VALIDATION_FAILED_TEXT")
+  public static Text chatValidationFailedText () { throw new AssertionError(); }
+}

src/main/resources/chipmunkmod.mixins.json

@@ -7,7 +7,9 @@
   ],
   "client": [
     "ChatScreenMixin",
-    "ChatInputSuggestorMixin"
+    "ChatInputSuggestorMixin",
+    "ClientPlayNetworkHandlerAccessor",
+    "ClientConnectionMixin"
   ],
   "injectors": {
     "defaultRequire": 1