My 2018 F150 B&O front right speaker sometimes sounds garbled. An intermittent problem. I slide balance left / right... sound good on left, garbled on the right side front. I put SYNC 3 into diagnostic mode by pressing the eject + track forward buttons for 10 seconds. When I run the test tones diagnostics the left tone comes from the right speaker and the right tone comes from the left speaker, I hear nothing from the back speakers. Anyone else have this problem? Sound like the diagnostic test programs needs its own diagnostic program.