Did you test it own? Have you same issue at the latest version or what? Or you are and call it playable?)
No, unfortunately I can't test it as I don't have an RPi4, I'm just trying to help you, and I'm based on the other comments I see here on the forum, so my initial reference is another post with a similar issue that was resolved in the latest version .
Your post is open and anyone can participate, but apparently no one who has an RPi4 has the same problem as you (since no one else has posted anything here).
Sorry, I can't help beyond that, so you need to hope that some other user will be willing to test and see if the problem is a bug or if it's a problem specifically with you.