Same again yesterday for me, as requested by Pix4D support I made sure I was running the latest firmware for aircraft, controller and app.
when the drone starts a mission, once it reaches the correct altitude it then proceededs to fly backwards to the start point, but with that said the drone then is in the correct orientation to start the grid run without having to turn.
again once it comes to the end of one run and moves to the next, as it approaches the next run it starts to rotate and backs it’s self into position, again this puts the drone in the correct orientation to start its next run without having to turn. To be honest it’s quite gracefull and reminds me of Torvil & Dean doing the Bolero, All that’s missing is the music.
but on a serious note, if this is meant to be then fine, it does the job perfectly. But I could imagine if it creates a problem as Frank Staats has posted then it could be very annoying and make Pix4D a no go.