Wrong Exif Data

I can't throw any light on this problem, but over the years in the Critique Gallery I have become aware that Exif data is not infallible!
My D7500 goes through patches of recording a -1 stop exposure compensation when this has not been set (or adjusting a setting by -1, so that +0.3 will appear as -0.7). Then after a day or so it will go back to normal. The actual images are not affected, so I live with it...
My D7500 goes through patches of recording a -1 stop exposure compensation when this has not been set (or adjusting a setting by -1, so that +0.3 will appear as -0.7). Then after a day or so it will go back to normal. The actual images are not affected, so I live with it...