1. My plan fell behind by one day - right it's 12:20 am
2. I read the Bible passage and marked it as done - right
3. It popped up today's Bible reading ... but had not yet marked the plan itself as caught up or shown today's reading
4. It updated the plan and showed today's reading - but popped the Bible back to yesterday's reading ... while I was reading it.
It should have retained today's position in the Bible rather than reverting to yesterday's reading.