Draft email inline images duplicated exponentially when adding PDF attachments via Graph API #2937
Description
Describe the bug
When creating a draft email with a signature containing inline images (e.g., 6 images), the Graph API initially returns the correct number of attachments (6). However, after adding a PDF attachment to the same draft, the API returns duplicated inline image attachments (13 total - 6 original + 6 duplicates + 1 PDF). On subsequent API calls, the inline images continue to multiply exponentially (e.g., each inline image appears 4 times on the next call).
Expected behavior
Initial draft creation: 6 inline image attachments
After adding PDF: 7 total attachments (6 inline images + 1 PDF)
Subsequent API calls should maintain the same 7 attachments without duplication
Inline images should appear only once regardless of how many times attachments are added or the draft is accessed
How to reproduce
Create a draft email with a signature containing 6 inline images
Call Graph API to retrieve attachments - confirm 6 attachments returned
Add a PDF attachment to the same draft via Graph API
Call Graph API to retrieve attachments - observe 13 attachments (inline images duplicated)
Make another API call to retrieve attachments - observe inline images now duplicated more times each
Each subsequent call continues to duplicate the inline image attachments
SDK Version
Latest
Latest version known to work for scenario above?
No response
Known Workarounds
No response
Debug output
Click to expand log
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### Configuration
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### Other information
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