diff --git a/module/device/platform/platform_windows.py b/module/device/platform/platform_windows.py
index c7fbeb497..2a520e8a6 100644
--- a/module/device/platform/platform_windows.py
+++ b/module/device/platform/platform_windows.py
@@ -92,11 +92,14 @@ class PlatformWindows(PlatformBase, EmulatorManager):
             # NemuPlayer.exe -m nemu-12.0-x64-default
             self.execute(f'"{exe}" -m {instance.name}')
         elif instance == Emulator.MuMuPlayer12:
-            # MuMuPlayer.exe -v 0
-            # MuMuNxMain.exe -v 0
+            # MuMuManager.exe api -v 0 launch_player
+            # Launch via MuMuManager instead of MuMuPlayer.exe/MuMuNxMain.exe.
+            # MuMuNxMain.exe is a GUI singleton, if two instances get launched at the same time,
+            # the second launch request is handed over to a MuMuNxMain.exe that is still initializing
+            # and gets silently dropped, while MuMuManager queues requests in backend service.
             if instance.MuMuPlayer12_id is None:
                 logger.warning(f'Cannot get MuMu instance index from name {instance.name}')
-            self.execute(f'"{exe}" -v {instance.MuMuPlayer12_id}')
+            self.execute(f'"{Emulator.single_to_console(exe)}" api -v {instance.MuMuPlayer12_id} launch_player')
         elif instance == Emulator.LDPlayerFamily:
             # ldconsole.exe launch --index 0
             self.execute(f'"{Emulator.single_to_console(exe)}" launch --index {instance.LDPlayer_id}')
@@ -314,9 +317,12 @@ class PlatformWindows(PlatformBase, EmulatorManager):
                 return False
             # Start
             if self._emulator_function_wrapper(self._emulator_start):
-                # Success
-                self.emulator_start_watch()
-                return True
+                if self.emulator_start_watch():
+                    # Success
+                    return True
+                else:
+                    # Start command was sent but emulator didn't come online, stop and start again
+                    continue
             else:
                 # Failed to start, stop and start again
                 if self._emulator_function_wrapper(self._emulator_stop):