Random Sound at Random Times?

[AC Question]

Sometimes, like once a day or two, a sound that is like a radio in a empty station sound for like 2 seconds, no notification or anything, no matter the volume, it sounds at max.
Its very annoying! Also now I'm seeing random reboots.
I have Kitkat and an Umi Zero...
Also I have Xposed Framework installed but disabling it doesn't help