long story short, whenever I skip, remove, any other level that isnt the one selected. Or removing a level, due to say a user being absent/offline not seen in two-three hours. It causes the playtime the elapsed time, ont he warp bar to start at 0.
while I rarely go out of my way to do this, it does happen once in a blue moon. Causing the time played on the warp bar to reset to 0, this does not effect the dashboard values.