launcher/launcher/src/main/java/sashegdev/zernmc/launcher/minecraft/launch/LaunchCommandBuilder.java

@@ -151,15 +151,9 @@ public class LaunchCommandBuilder {
                 command.addAll(getModloaderLaunchArgs());
             }
 
-            // Append width/height if custom resolution
-            if (options.getWidth() > 0) {
-                command.add("--width");
-                command.add(String.valueOf(options.getWidth()));
-            }
-            if (options.getHeight() > 0) {
-                command.add("--height");
-                command.add(String.valueOf(options.getHeight()));
-            }
+            // NOTE: --width/--height are NOT appended here because version.json
+            // game args already include them via ${resolution_width}/${resolution_height}
+            // placeholders. Appending them again causes MultipleArgumentsForOptionException.
         } else {
             // Fabric, vanilla, and other loaders: use manual JVM args
             command.addAll(getJvmArguments(options));