[BUGFIX] Fix thumbnail reference being always from toplevelId (kitodo#1563)

Co-authored-by: Michael Kubina <[email protected]>

Author: michaelkubina

Classes/Common/MetsDocument.php

@@ -456,7 +456,7 @@ private function getPage(array &$details, ?SimpleXMLElement $metsPointers): void
         ) {
             // Link logical structure to the first corresponding physical page/track.
             $details['points'] = max((int) array_search($this->smLinks['l2p'][$details['id']][0], $this->physicalStructure, true), 1);
-            $details['thumbnailId'] = $this->getThumbnail();
+            $details['thumbnailId'] = $this->getThumbnail($details['id']);
             // Get page/track number of the first page/track related to this structure element.
             $details['pagination'] = $this->physicalStructureInfo[$this->smLinks['l2p'][$details['id']][0]]['orderlabel'];
             $details['videoChapter'] = $this->getTimecode($details);