Ditto for T-Mobile HTC One (M7)
There's a lot I really like about the Google Launcher, but this just drives me nuts. I didn't really understand the workaround suggested here ( though I have no doubt it works). But the suggestion sounded on target. So, I went into my app list and shared it from there. It didn't do the funky stuff any more. I wonder if there's a setting to change that behavior: like someone thought, Hey, take a picture and go back to our regular programming? It's a shame because I really feel that the Google camera takes better picture.
In any case, just to let folks know that this is a real problem. The OP was on target.