TYPO3 Core

EXT:file_list is using the wizard_link wizard as part of the plugin configuration (FlexForm):

<settings.path>
    <TCEforms>
        <label>LLL:EXT:file_list/Resources/Private/Language/locallang_flexform.xlf:filelist.path</label>
        <config>
            <type>input</type>
            <size>48</size>
            <eval>trim</eval>
            <wizards type="array">
                <_PADDING>2</_PADDING>
                <link type="array">
                    <type>popup</type>
                    <title>LLL:EXT:file_list/Resources/Private/Language/locallang_flexform.xlf:filelist.path.wizards.link.title</title>
                    <icon>EXT:backend/Resources/Public/Images/FormFieldWizard/wizard_link.gif</icon>
                    <module type="array">
                        <name>wizard_link</name>
                    </module>
                    <params type="array">
                        <blindLinkOptions>page,url,mail,spec,file</blindLinkOptions>
                    </params>
                    <JSopenParams>height=600,width=800,status=0,menubar=0,scrollbars=1</JSopenParams>
                </link>
            </wizards>
        </config>
    </TCEforms>
</settings.path>

This shows such an option for the path:

When choosing a path with the wizard, the path is properly shown in the textbox but never copied to the corresponding hidden field (nothing happens when the field looses the focus). This leads to the path being "discarded" and never persisted to the DB. If however I manually type a path (or copy paste it), then it is properly persisted.