To find back to the connected mode in case of inconsistent content ("mixed mode") it is an editorial help if the unique id uid
of content elements in the selection field "Transl.Orig" tt_content.l18n_parent
is displayed regardless of whether debug mode is activated and the admin status of the backend user.
To achieve this, place this file in your sitepackage under: EXT:sitepackage/Classes/User/Tca.php
and add the following line in EXT:sitepackage/Configuration/TCA/Overrides/tt_content.php
:
$GLOBALS['TCA']['tt_content']['ctrl']['label_userFunc'] = Tca::class . '->labelWithUid';