If there is e.g. paragraphs entity reference in a node, and you clone the node the reference is targeting to the same (paragraph) entity. If you delete one of these nodes, the referenced entity will be deleted - independently there is another reference to it.
I think there should be a check of usage and delete referenced entity only if no other entity_reference_revision reference exists.
To reproduce:
1) add paragraph reference to your content type
2) create a node type with at least one paragraph
3) clone your node - you can use core createDuplicate() function
$node = \Drupal\node\Entity\Node::load([NID]);
$clone = $node->createDuplicate();
$clone->save();
4) delete cloned node
$clone->delete();
5) check original node - the paragraph disappears
Postponed: needs info
1.0
Code
The change is currently missing an automated test that fails when run with the original code, and succeeds when the bug has been fixed.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Patch 14 is causing errors when deleting on D10 because of a missing access check on the query. As Berdir mentions this patch is obsolete by adding the purger queue.
Rerolled patch for Entity Reference Revisions 8.x-1.11