I don’t have many details, but I was playing using three decks yesterday and after Deck 2 track ended, I loaded up a new track and started a loop. I switched from Deck 2 to Deck 4, pulled down Deck 4 fader just a tad, and introduced Deck 2 pulling the fader up.
When stopping Deck 4 using the Play/Pause button, Deck 1 (which was about halfway through the track) started over completely from the start of the track.
This is not the first time I’ve run into this issue. Though I am fuzzy on the exact details, I am 100% certain that I only pressed buttons and interacted with the right side of the controller (Deck 2 / Deck 4), which should have had zero impact on Deck 1. Also, I’m not aware of any normal way of resetting a track like this to even see this behaviour, save having a CUE at the beginning of the track, which I did not have and I did not press a CUE button or any other button on the left side of the controller.