Avoid crx-quickstart deletion in AEM 6.5
Clearing the HtmlLibraryManager cache via can delete all the content of crx-quickstart during cache invalidation.
The impact is critical as this could delete the full instance.
The issue has been solved and will be part of AEM 6.5.1 that is planed to be released on June 27th.
In the meantime, after installing AEM 6.5, updating the bundle com.adobe.granite.ui.clientlibs to the version 1.0.92 will avoid this issue.
A content package with this bundle is available below