I took my new FE 24-105mm f/4 G OSS for a test run, and in the course of using it on two different bodies (in this case, the A6500), noticed that there is a sporadic drop in exposure value by about 1/3 stop every 8 or 9 frames.
A couple days later I shot another series with the A7RIII body, and came up with the same result. It occurs whether on single shot mode or multi shot mode, and in all cases, I haven’t changed any of the exposure settings from one frame to the next.
Any thoughts on why this is happening and what can be done to correct it?