You're Very Good Person Because You're Solving My All HTC One issues one by one.
All of a sudden, all my M8 Camera options has been vanished without a sign. Like this:
Some said it would be because the user is using a messaging app to use the camera. Is that what you're doing?
However, if this happens right on the Homescreen camera launching, and every time you take a photo, the same checkmark and back button appears just like the screenshot posted. Also after selecting the checkmark, it closes the camera and brings you back to the home screen.
Aside from going to Settings > Apps > All > Camera > Clear Data to fix this, which seems to not workable for now, any other ideas why this would be happening and how to deal with it?