TYPO3 Core

The issue does not affect new files only, but any file when a new file has been uploaded.

This is a nasty bug.
As in FormEngineLinkBrowserAdapter.checkreference the window.opener is checked, this is gone by any form action inside the Wizardwindow.
So this has to be changed completely to local var, and has to be included in each form of the Wizardwindow.

FormEngineLinkBrowserAdapter.checkReference = function() {
    var selector = 'form[name="' + LinkBrowser.parameters.formName + '"] [data-formengine-input-name="' + LinkBrowser.parameters.itemName + '"]';
    if (window.opener && window.opener.document && window.opener.document.querySelector(selector)) {
      return window.opener.document.querySelector(selector);
    } else {
      close();
    }
  };

Patch set 1 for branch TYPO3_8-7 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/56595

Patch set 1 for branch TYPO3_7-6 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/56596

Patch set 2 for branch TYPO3_8-7 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/56595

Patch set 3 for branch TYPO3_7-6 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/56596

Patch set 3 for branch TYPO3_8-7 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/56595