We found revisions were missing from display when diff module was used. The root cause seems to be #2882334: Revisions are not visible for some nodes.

For now we are disabling the diff module. We should re-evaluate when there is an RC or stable release of the diff module, or the issue is fixed.

The underlying issue has a good chance of being something paragraphs-related that gets the NULL values into the node_field_revision.revision_translation_affected column.

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drumm created an issue.