windows_azure_storage_info has missing thumbnails

[sta1r]

Describe your question

Images have been uploaded to the container (in all the expected sizes) but for some reason the windows_azure_storage_info postmeta for the attachment has missing thumbnails.

We're seeing e.g.

a:5:{s:9:"container";s:7:"staging";s:4:"blob";s:53:"2024/07/August-social-media-calendar-header-image.jpg";s:3:"url";s:108:"https://mkr1en1mksitesap.blob.core.windows.net/staging/2024/07/August-social-media-calendar-header-image.jpg";s:10:"thumbnails";a:0:{}s:7:"version";s:5:"4.4.2";}

In the affected entries, we see a version range from 4.3.2 to 4.5.1, but there are plenty of successfully-stored examples as well for these versions. Is this a known issue?

Is the only solution to re-upload the affected images?

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[sta1r]

Update - this appears to be a problem relating to EWWW Image Optimizer. windows_azure_storage_wp_generate_attachment_metadata is hooked after EWWW\Background_Process::handle runs, and under certain conditions, both $data['sizes'] and $data['original_image'] are empty, meaning that $thumbnails is stored as an empty array.