So the file could be a problem. As for the equipment sensitivity - only the most sensitive ones will be affected by the power line anomalies.
It’s very odd as to why? But I suspect you’ve found your cause.
What make/model/brand of media did you have that long music file stored on? A usb stick? An SD card? An ssd? Maybe you’ve got a media card that’s got an astoundingly cheap or faulty memory array or just generally slow playback speed. Try different/better media - it could be counterfeit media too (cheap media re-stickered to be sold as expensive media
So, the musics I use always go through Recorbox into a new ScanDisk flash drive, every other song is in the same drive. This mixedset was not actually mine, I have got it from youtube, it was just to keep some background music while the party was getting started (dinner time)… As I mentioned, I will play another mixedset, this time my own, to see if the same thing happens again.
I just hope SCLive is not the problem.
It might just be that long tracks hit some sort of bottleneck from the drive - due to a limitation of the media, not the player
Try a different brand (maybe a higher cost) drive
No mediadata throughput issue should cause the whole unit to shut down.