Flutter app stuck in black screen when opening in some android devices

I recently uploaded my first Flutter app to the Play Store. Some Android users have reported that the app shows a black screen when launching the app and stays there, it doesn't load or show the app content. I don't know if it can be related or just a coincidence, but all 3 of them have a Samsung phone with Android 12, but I have tried it on my Samsung with Android 12 and works fine. I tried updating the flutter version and the plugins but they are still getting this black screen and the app doesn't show. My minSdkVersion = 21, targetSdkVersion = 30 and complieSdkVersion = 33. Does anybody have any idea on what could be the cause for that? I'm completely lost. Thanks!