Let just say I adjust my volume to 5, and then when it alert, it will beep at vol. 5 for few seconds, and then continue beeping at vol. 2 all the way until it can't detect anymore signals.
Now, instead of continue beeping at vol. 2, it will gradually mute the whole thing even there is still radar being detected.
I didn't do anything to it, it just does that one day. Did it do it to yours?