M4R not supported anymore?

Previously, I have mass converted all my ringtones to m4r and it's amounts to 200+. And using the official OS10.0, I can set them as tone by selecting browse tones instead of browse musics. The reason for mass converting them is so the stock music player won't plays them when im playing all my mp3s. Everything is all good until I've upgraded to the leaked OS10.1. Now I can see them files when using the file manager but when I want to set them as tones, they are nowhere to be found. Are m4r being phase out now as files being supported by BB10? I have attached an example m4r file below. Or issit a bug as I'm using a leaked OS?

BBRelaxed_Gong.m4r hosted on Mediafire

Posted via CB10 on a sexy black BlackBerry Z10