I have the same problem too , and as u mentioned , I have hostmode , I was able to use radio , but it;s long time since the last use, so I don;t know if the problem happened before or after installing hostmode,, but u might be right ... and for more details , I want to tell u that my hostmode is not working yet since i installed it and I have an error say: kenel power version no proper match, something like that .. and beside that u may need to know that I have 2 radio players and both are not working now .. and the last thing : FM transmeter works fine with no problems ..
so i hope u maight find a way to help us .. thank u anyway ..