Issue Summary

Legacy atlassian-macro-output-type: INLINE parameter causes Excerpt macro content to be hidden in View Mode after migration.
Following a migration or transition from the legacy editor to the new editor, certain pages exhibit an issue where the Excerpt macro (and potentially others) fails to display content in View Mode, even though the content is visible in Edit Mode.

The underlying storage format contains a legacy parameter:
atlassian-macro-output-type: INLINE

In the new editor, this parameter appears to be unsupported or misinterpreted, causing the macro to treat block-level elements (like images or multiple paragraphs) as invalid or hidden.

Steps to Reproduce

1. Have a page created in the Legacy Editor containing an Excerpt macro with the parameter atlassian-macro-output-type set to INLINE.
2. Migrate or convert the page to the New Editor (Fabric).
3. View the page.

Expected Results

The content within the Excerpt macro should be visible regardless of legacy metadata, or the unsupported metadata should be stripped during the migration/conversion process.

Actual Results

The Excerpt macro appears empty in View Mode. In some cases, the macro may also be missing from the "Suggested" macro list in the macro browser for that specific page.

Workaround

Manually delete the affected Excerpt macro and re-add it. This clears the legacy metadata and allows the macro to function correctly in the new editor.