If you see a pause symbol or a number on each new frame you capture you may have accidentally enabled a feature called "Shooting on Twos'.
This feature allows you to automatically capture multiple images in order to slow down a sequence. To change the it:
- Tap and hold the shutter button to open the Capture Multiple Frames settings.
- Select the number of frames.
- Tap Done. From now, each image captured will automatically paused for the number of frames selected.
Here is a link to the relevant section in the manual:
If you already shoot a sequence and want to change the pause for each frame. Use the retime feature: