I've seen posts elsewhere indicating that I'm not the only one with this problem (and one asking about console commands to fix it, but that wasn't answered), but I've searched the UFO4P forum thread of comments, and for other similar bugs (including closed bugs), and haven't found any there, so idk whether this is something that UF04P can fix. Radio Freedom still plays music (I later added a mod for more variety in the music) and announces the time, but instead of saying anything about a settlement being in trouble, it just says 'nothing to report', 'all's quiet across the commonwealth', or some other similar statement. Originally playing a run without DLC or UFO4P, I got to a point where neither Preston nor Radio Freedom would give me any more radiant quests to help settlements.