Why is it that the ripping progress for each track bar only ever shows the text 0% or 100%, even though the graphic fill of the bar progresses smoothly thought the track ripping, and the encoding percent behaves exactly as expected?

I'm sure I can't be the first person to have noticed this behaviour, but searching this forum I can't find any explanation. I always assume that it will get fixed in the next version, but it's been like that for what seems like forever now, and is still in the latest beta.