I would have thought that accuracy issues would have been noticed long before now. Guess that indicates the level of priority assigned to the gun.
Remember, the original gun for the F-35 was supposed to be the Mauser BK 27.
Which got killed by NIH.
I recall early presentations about the F-35 claimed the BK27 would be accurate enough, in conjunction with the FCS, to "snipe" ground targets from relatively high altitude. Nowadays something like Hatchet makes a lot more sense.