I have a similar problem with the plugin …
After latest update and switching to automatic data-blockingmode, the header-images are not showing – neither before my active cookie-consent, nor after … Well, after my active consent I do get to see the header-image on the frontpage, but when clicking on other pages (showing no images) and returning to the frontpage then the header-image is also missing there.
The theme PORTO was used … I had to deactivate the Cookiebot-plugin for all images to show again. … Now awaiting a plugin-update to fix the problem.