Fiesta 2015 model.
Until recently, playing songs from the USB stick was fine.
However, it has just developed a fault: If I press browse and then down to start to navigate to another track, the display starts going mad, repeatedly swapping between displaying two options, or scrolling through all the songs in alphabetical order with only a single track being shown on the bottom row and so on.
I've tried with a completely different USB stick so know it isn't that and have selected reset USB but still no joy.
I've recorded a short video of what is happening here:
Thanks in advance for any help or suggestions.