Title: Users may experience files and media showing as not supported when uploading in webparts within SharePoint Online
User impact: Users may have experienced files and media showing as not supported when uploading in webparts within SharePoint Online.
More info: Some users may have seen the following error message: ‘This doesn’t seem like a supported image file. Please select a different image’.
As a workaround, users could ignore the error and proceed with the upload; the error message stating the image doesn’t seem supported appeared incorrectly.
Final status: We’ve finished the deployment of our fix and confirmed impact was successfully resolved.
Scope of impact: Impact was specific to some users who were served through the affected infrastructure.
Start time: Wednesday, January 24, 2024, at 9:45 PM UTC
End time: Tuesday, February 27, 2024, at 12:40 AM UTC
Root cause: A recent code change meant to optimize the webpart upload process had caused a timing issue that supplied an uploaded file’s current state before the service was ready to process it, resulting in impact.
Next steps:
– We’re reviewing our code change testing and validation procedures to identify opportunities to improve impact detection.
This is the final update for the event.
