After months of receiving this system perfectly suddenly something seems to have happened starting about 3 days ago. As background I am using a Uniden BCD436HP. I am located in Billings about 3 miles from the Clever tower to the east, and the same distance from the new Billings tower to the west. It appears that starting about 3 days ago the ONLY talk group I am receiving while scanning is 47 the Sheriff dispatch group. It comes in loud and clear using multiple different antennas. Of course before I always had good copy on all of the talk groups in the system. Anyone have any ideas what could suddenly have changed? TIA