This was working, and now just shows with my default empty image. Inside the bricks builder it shows as working. I have checked the image permissions and you can access their URL when logged out.
Actually just thought to test with a shortcode and had same issue (Shows on backend and not on frontend) - so I do not think it is Bricks, unless you do have a filter somewhere? Its strange as only just started to be an issue (noticed today, but could be since update)