I have added a feature request for the safe clearing of user properties
https://support.servoy.com/browse/SVY-17384
I have also archived / deprecated the local storage service extension.
It’s functionality is otherwise duplicated by the Application functions and does an unsafe clear()
We will remove it from the package index, but it will still be accessible to download for compatibility reasons from the Git repo binary release.
https://github.com/Servoy/webstorage
Thanks for bringing this to our attention