Your Woovebox has three different auto-slicing modes. The one we will be using is "auto slice with full playthrough".
This slicer mode will chop up the chosen (e.g. slow-blinking) slice into sixteen, roughly even parts that play through to the end of the master sample, rather than play up until where the next slice starts.
You can of course always change the start and end-points of your slices manually if you so wish.