I realise this thread is a bit old now & you quite probably have already solved your problem but I'll post this anyhow!! :P
I had one of our clan members with exactly the same problem and after trying many things the only way we could fix it was to delete the sof2mp.cfg file from the games main directory and any subsequent mod folders, forcing the game to create new ones upon restarting.
This fixed the PB issue but unfortunately also removes any names, binds, etc that you may have set up and returns all settings to default. Drastic I know, but it worked!! ;)