Canon EOS 7D Mark II (G) Instruction Manual page 501

The multiple-exposure image is shot in 1 quality.
When the image-recording quality is set to 41 or 61, the
multiple-exposure image will be recorded in 1 quality (p.245).
When I use the <f> mode with flash,
the shutter speed becomes slow.
If you shoot at night when the background is dark, the shutter speed
automatically becomes slow (slow-sync shooting) so that both the
subject and background are properly exposed. To prevent a slow
shutter speed, under [z1: Flash control], set [Flash sync. speed in
Av mode] to [1/250-1/60sec. auto] or [1/250 sec. (fixed)] (p.263).
The built-in flash rises by itself.
In the <A> mode, the built-in flash will be raised automatically when
necessary.
The built-in flash fires continuous flashes and makes a sound.
In low light, the built-in flash fires continuous flashes as an AF-assist
beam (p.89) to make it easier to focus. It also makes a sound when it
fires the flashes. This is normal and not a malfunction.
The built-in flash does not fire.
If you use the built-in flash too often in too short a period of time, the
flash may stop firing for a while to protect the flash unit.
The external flash does not fire.
If you use a non-Canon flash unit with Live View shooting, set [z6:
Silent LV shoot.] to [Disable] (p.297).
Troubleshooting Guide
501