This stuff is just Chinese whispers, nothing happened in bosaso and they have been losing fighters to defection. But of course people hype things up all the timeI don’t reject that the latter could happen. However the PSF have been very very hostile to the state forces. I could see their association with HSM branding them a fifth column and loss of a support base.
PSF seems to be a relatively radicalised force in their opposition however. With them threating to lock down the airport and brandishing technicals through the streets of Bosaso. Time will tell.