Alright. To import “raw” HTML into a rich text field in your Webflow collection without triggering the automatic fetching and importing of images, you’ll need to work through the Webflow API. When using the API, you can add raw HTML directly into a CMS Rich Text field. This approach allows you to bypass the automatic image fetching that happens when you use the Webflow interface directly.
If your HTML only includes basic elements that are supported by the rich text field, you should populate this field via the API. Webflow will parse your HTML content correctly when you update the field through the API, ensuring that your HTML is stored and delivered as intended without loading or calling any URLs in the HTML blob.
Here’s a link to another Webflow forum thread that might be helpful.
Best of luck!