Switch subscription, but user still have access to old subscription pages

User switch subscription, but user still have access only to old subscription articles and posts on front-page and menu

We have a "free subscription" but when user upgrade to payed subscription pages, those articles that are only available for payed subscription, are not shown on front-page or in menu. However, they are accessible if you have the direct URL.

Protected content has a lot of bugs. We report them continuously and we receive very kind replies from the support staff, but nothing ever gets repaired? That is not acceptable.

Please attend to this bug asap. Thanks in advance.