Hi I'm having the same issue as you described, and even with latest firmware 1.01 it still happens, it doesn't always happen, just randomly. Today it happened again and I recorded a video:
https://www.youtube.com/watch?v=YISOoalH7Wc
Unfortunately I only had my iPhone with me, so you may need to set it to 1080p in order to see the distance indicator.
I suspect they fixed something so it doesn't always happen, but still something's missed :-(