Ensure only the post being edited in the classic editor is queued for validation #1424
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When a post is saved via the classic editor it needs to be re-validated on the frontend to show the validation warning:
However, at present the
save_post
action is being used in a way that other post edits are also causing re-validation to happen for them as well. This is particularly problematic when doing a mass import of posts.So what is needed is to restrict the
save_post
action to only follow-through when we are explicitly saving changes for a specific post in the classic editor.Note that this is all much cleaner for Gutenberg because we can rely on the REST API field to manage the re-validation.
Fixes #1404.