I am having this same issue, except it is worse than what has been shown on this thread. The first time it happened was when I was copying from the SD to my computer.....the bottom 2/3 of a certain picture was totally gone, with a blank gray color. I deleted the picture thinking nothing of it, before I read this thread. I can't remember if I was scrolling through the pictures on the SD card, or if this happened after I had copied them to the computer, or if it was RAW or jpdg (I have one card for jpeg, the other for RAW).
Yesterday, while scrolling through pictures in camera, some of the pictures were 'bleeding' into eachother next in order, like overlapping. I only had about 25 pictures on the card, so I scolled through it completely and the next time through the problem was gone.
But, now it is doing it again in camera with the same pix. After download to the computer, this is what I am getting. You can see what the thumbnail looks like at the top which is correct, with the corrupted photo at the bottom when I enlarge it:
View attachment 146337
This is only happening on the jpeg SD/file, the RAW are ok. I have slot one RAW, slot two jpeg. Also, when I was taking the pic of the computer to post this, other jpegs were doing something similar or worse, like half the screen was deleted with a pink color similar to the original gray occurrence, but when I got out of the file and went back in, they were OK. Also, LR will not recognize this particular corrupted jpeg. This is irritating.
I will switch the SD cards around today and try different settings on the slot designation and report back.
Update 1: Switched the cards, same setup. Glitchy 32gb card that was jpeg slot 2 now in slot 1 RAW, 64 gb in slot 2 for jpeg. Took about 50 pix, no corruption on any files RAW or jpeg.