Pad bug with mame2003 and killer instinct

After a lot of rehearsals I succeeded (reading the log files) Starting killer instinct at a good frame rate With mame2003. Unfortunately, the first key is pressed automatically. This issue makes the game non-playable. The game has a pad test in the test and you also notice the bug. Can anyone help me? I use android 10 and retroarch plus. Oppo a5 2020