The user group restrictions won't hide the links that are restricted
Please describe your issue with some more details.
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Seem that this is the CMS issue and there is no answer from @pappis91
Please describe your issue with some more details.
If there is any chance that your issue is related to the Joomla! CMS, please open an issue (with detailed description) here: https://github.com/joomla/joomla-cms/issues and close this one - thanks!