I have the same problem with my 2019 Laramie crew cab with the stock radio without navigation. When I start the vehicle, literally 50% of the time, the FM channel will fade in and out as I drive. If I scan thought the stations, it will only find around 4 to 5 channels. As soon as I switch to the AM station and then back to FM station, it instantly fixes the problem and finds several channnels again. In some cases after doing this fix, the surround sound mode sounds like stereo mode until I go into the audio settings, and notice surround sound mode is already selected. When I click the surround sound mode button again regardless, it instantly sounds correctly. I have it at the dealer right now, but they claim there is not a fix for this and Ram is not even aware of this issue. Yet when the dealer tried it on another brand new Ram on the lot, it did the same exact thing. The dealer checked and the radio software is up to date. Clearly this is a problem and needs to be resolved quickly before I start questioning the overall build quality of Rams.