Default Radio gets interrupted instead of playing in the background

Hi guys,

have just noticed a strange behaviour of the FM tuner - when listening to music and another sound is about to be played (like system event, etc.) the radio listening is completely interrupted, another sound plays and then FM radio starts again to continue with playing. I would expect to hear the radio in the background all the time even when other sounds are called, interrupting the radio listening is really annoying and you end up with closing the radio application and starting to MP3 listening then is there any other FM radio app, tweak or another suitable solution?