Hi,
This is coming from the fact that WP Customer Area uses the template single.php from your theme to render private contents, and page.php to render other pages (the sidebar actually comes from your single.php template).
To change that behavior, you can copy the template themes/your-theme/page.php to themes/your-child-theme/cuar.php. So the private contents won’t use that single.php template anymore, but the cuar.php template instead. Feel free then to edit it to match your needs.
If you need more control over the templates, please check our Theme development documentation where all available templates are listed.
Regards.
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