Exactly where the drift starts, the tilt angel (combined pitch & roll) change from an earlier average of 14 degrees while holding position, to a rather constant tilt just a tad below 10 degrees. This seems to generate a drift reaching 5mph during...
Yeah, that's my guess. The drone was blowing away, but not due to a too strong wind, instead the drone was limited in tilt which made it unable to fight the wind & hold position.
If comparing the brownish area (where you had problems) with the...
Yeah... your drone indeed drifted in the wind direction uncommanded.
The incident period was between that the last pano mode was ended & the last RTH initiation... between 771,6sec & 815,3sec into the flight, nowhere else. During this period the...