This PR is a fix for issue #15627 where the default sorting behaviour of Magento was changed in Magento 2.2.4.

dverkade · dverkade · commit 8981225996e9 · 2018-05-31T16:12:13.000+02:00
diff --git a/app/code/Magento/Catalog/Block/Product/ProductList/Toolbar.php b/app/code/Magento/Catalog/Block/Product/ProductList/Toolbar.php
@@ -196,7 +196,7 @@ public function setCollection($collection)
                 $this->_collection->addAttributeToSort(
                     $this->getCurrentOrder(),
                     $this->getCurrentDirection()
-                )->addAttributeToSort('entity_id', $this->getCurrentDirection());
+                );
             } else {
                 $this->_collection->setOrder($this->getCurrentOrder(), $this->getCurrentDirection());
             }

Original file line number	Diff line number	Diff line change
`@@ -196,7 +196,7 @@ public function setCollection($collection)`
`196`	`196`	`$this->_collection->addAttributeToSort(`
`197`	`197`	`$this->getCurrentOrder(),`
`198`	`198`	`$this->getCurrentDirection()`
`199`		`- )->addAttributeToSort('entity_id', $this->getCurrentDirection());`
	`199`	`+ );`
`200`	`200`	`} else {`
`201`	`201`	`$this->_collection->setOrder($this->getCurrentOrder(), $this->getCurrentDirection());`
`202`	`202`	`}`