Features are emergent out of solving the business needs. If you see a business opportunity in toasting bread, it wouldn't make sense to have an outstanding issue that says "Affix fireplace to the bottom of the apparatus". Instead, knowing your business goal, you start to think about how bread should be toasted and when you come to the revelation that an electric coil is the most efficient method to solve your problem, you finish adding it to the product and then revisit what your next business need is in the context of what now exists and what you have learned in the meantime.

Issues only come into play when your understanding is wrong, to serve as a reminder to revisit your assumptions. New features don't fit. If you are spending so much time finding features to develop faster than you can develop them, your human resource allocation is flawed.