Yes, this is a newly-known issue with the latest Gutenberg. We have fixed the issue yesterday and are working on getting a new release out the door. In the mean time, you can install the latest 2.5.x build from our Development Builds page.
In any case, we should have 2.5.2 released today.
Hello @caminao
We’ve recently fixed the conflicts with the Gutenberg plugin for adding images (media elements) in the latest version (2.5.2).
To resolve this issue on your site, please ensure you’ve updated your AMP plugin to the latest version.
You can easily do this by going to Dashboard > Plugins > AMP > Update
If you’re still experiencing issues after updating, please don’t hesitate to reach out to us for further assistance. We’re always happy to help!
We hope this helps!