My '14 3500 did it a LOT. It would never read the correct number of songs. My SD card had 1,391 songs on it. My truck would see anywhere from 250 to 3500 songs. No rhyme or reason, it was always different. It also would skip a lot. By that I mean, it sounds like you were holding down the fast forward button on a casette deck. Occasionally it would lock up. The radio was replaced twice. The media hub was replaced, along with every cable and connector in the truck. The tech joked that he could take my dash apart blind folded. Nothing worked. The dealership would put my SD card in a truck on the lot and it would work fine, they would then swap my radio with the good one and it would mess up once installed in my truck. They talked with some powerful folks at Ram, to include the actual guy who designed the 8.4. They bent over backwards to help me but after 7 tries, I think they finally just gave up. They offered to buy it back and give me a new truck. I now drive a '15, and this radio works as designed. Very pleased with the resolution!
