Hello,
When I am logged in to WP Dashboard all icons appear as normal.
When I am not logged in (any normal visitor) I can not see icons from services etc.
I am using child theme with custom css.
www.gallantlearning.com
Also how do I confirm that my version of the theme is the latest?
Thanks
SOLVED
Great! 
How was this resolved?
The same thing is happening to me at review site: www.gracecomputer.net/spectrumledusa
Every morning I view the site, The elements are gone. When I log in to the backend, it comes back up.
Hi,
Try going back through the theme setup panels (customize theme). Find the areas that need to be updated. Update them & wait (see spinning cursor) . Do not try to update too much at once.
I found I was just clicking and going through everything really fast and was stumped when it didn’t work.
I recommend re updating everything, and waiting until cursor finishes spinning.
The WP dashboard is very slow.
Thank you! They came back up. Hopefully this time, they will stay.