Flight Data: display of mission is losing precision?

This issue comes from this discussion: https://discuss.ardupilot.org/t/integrity-of-waypoint-is-poor-after-writing-to-pixhawk-2-1-cube

When the Flight Data screen displays the mission it seems to be losing some precision as shown below when a very small 2m circular mission with 32 waypoints was created:

Flight Plan looks ok:

Flight Data looks odd:

Start with the Flight Data screen and reproduce the reported case using a very small 2 m circular mission with 32 waypoints. Compare its displayed mission with the Flight Plan view and the linked discussion; done means Flight Data preserves the waypoint precision visible in Flight Plan.

Written by the indexing model from the issue text.