Difference between initial and computed image locations

We are flying a 600 acre graded construction site using a Phase One XM-100… Trimble R10 running RTK corrections to the drone via the DJI controller. We have been having issues over the past 2 weeks with the initial and computed position of one line of imagery varying quite drastically. Pix4d seems to create erroneous tie pts in this area which translate to an inaccurate DSM surface. We started flying the site using 65 forward overlap and only 50 side overlap but have not had issues up until last week with creating enough accurate tie pts with the somewhat low overlap. Is it possible the controller is losing the connection with the sensor and creating erroneous gps data that is incorrectly used in the Pix4d processing. Thanks for any help?

I replied in the ticket you submitted.