Native screen recording issue (Shift+Ctrl+Alt+R)

I wanted to use the built-in screen recorder to record how to do an installation but the recording terminates during different portions of the install application.

Example:

    Begin screen recording on a Live USB viewing the desktop
    Click Install Ubuntu 17.10
    Screen recorder terminates

The screen recorder also terminates after whether choosing to download updates or choosing to install third party applications screen.

Also terminates after choosing a security key for installing an encrypted install.

Not sure where to report this bug as the screen recorder shouldn't terminate unless explicitly commanded to do so.

 I tried on my currently installed system, and the recorder dies when I umounted/mounted a drive.

Seems to be where the issue lies.