Recently I noticed that the Time of Day data field that I set on data screen 1 changed to Lap Time. This happened after I paused the Explore in mid ride.
In the past, I've noticed data fields randomly changing when charging the unit.
A related issue is that the Explore will power on when connected to a charger even though it was powered off before connecting to the charger.
These may not be bugs, but they are certainly unexpected and unwanted behavior.