Hi,
DJI is not that clever…if the total volts < treshold ( < 8.5 volts total) value than a forcelanding is initiated.
Plus the % level shows zero % from that point and further.
But if the voltage drop is momentarily than it should give the option to cancel the autolanding and give control the the pilot (with a warning ofcourse > land ASAP)
see the voltage line in the chart.
Just before the forcelanding a warning in the log " BATTERYTEMPVOLTAGELOW"
Checked one of my own MA log ; 58% = approx 3.7 volts, so you start value was correct, but ofcourse its always wise to start a flight at 100%.
cheers
JJB