This is straight from the samsung page you speak about. The dontkillmyapp page has not been properly maintained and updated. The ratings are absolute. The samsung card talks about android P update and the android 11 update. The problem you describe does not happen on the latest software of Oneui. They are asking for feedback on android 14. The latest android is 15 and 16.

UPDATE 07/2024: Samsung officially promised to drop the non-standard optimizations: "To strengthen the Android platform, our collaboration with Google has resulted in a unified policy that we expect will create a more consistent and reliable user experience for Galaxy users. Since One UI 6.0, foreground services of apps targeting Android 14 will be guaranteed to work as intended so long as they are developed according to Android’s new foreground service API policy.” If anyone has information about this or experience with Android 14 on Samsung phones, please, let us know any feedback on this