TYPO3 Core

I have set an additional page property (FileReference) in TCA. The defined FileProcessor:

page {
 10 {
    dataProcessing {
     50 = TYPO3\CMS\Frontend\DataProcessing\FilesProcessor
       50 {
          references.fieldName = page_additional_image
          as = page_additional_image
        }
      }
    }
  }
} 

Until 8.7 all is working fine, in 9.5 the Query which is generated is wrong, if a CType list (plugin) is on the page.

SELECT `uid` FROM `sys_file_reference` 
WHERE (`uid_foreign` = 202) 
AND (`tablenames` = 'tt_content') 
AND (`fieldname` = 'page_additional_image') 
AND ((`sys_file_reference`.`deleted` = 0) 
AND ((`sys_file_reference`.`t3ver_state` <= 0) 
AND (`sys_file_reference`.`pid` <> -1)) 
AND (`sys_file_reference`.`hidden` = 0)) 
ORDER BY `sorting_foreign` ASC

The uid_foreign In the WHERE-clause is not the page uid anymore, it is the uid of the plugin from tt_content.

Information from debugging so far:
The variable $processedData["data"] in "typo3/sysext/frontend/Classes/DataProcessing/FilesProcessor.php” has already the wrong uid