Try moving your launch point, and maybe do another compass cal. at the new location. Take off the shirt with magnetic buttons - not kidding, I have a long sleeve flannel shirt with those buttons...
Seriously, a chunk of rebar or buried iron pipe will do it...happened here once and found an old claw hammer a few inches under the grass...of course 1' away from the intended launch site.
We are in a "solar maximum" right now and while that might not directly influence the magnetometer it can definitely cause GNSS issues.
Move your launch point 20' away and give it a try, but by all means redo your compass calibration first...GL!