However, changing from "Electronic Shutter" to "Mechanical Shutter" on the camera body seems to do the trick. These two images use the Mechanical Shutter, and the shadowy bands seem to be gone.
I had been using the Electronic Shutter exclusively, because at that setting I could take up to 14 shots per second (as opposed to the Mechanical Shutter, which peaks at 8).
#Photography
@DaveMasonDotMe
yep. An electronic shutter is reading the scans of the screen rather than a duration of several scans on the screen
If they are not perfectly in sync and also averaging two or more scans, there is a potential to have that kind of banding. Especially when the fluorescent lighting is not flicker free.
I saw your second post where you found a solution. The mechanical will average out the flickers and the scanning