Hi @ylbernhard!
Unfortunately, when the page is refreshed or the app has lost an internet connection, the time value, counted by the plugin, will be refreshed.
However, you can use “Schedule an API workflow” to delete it on the expiration date.
Please take a look at these forum threads which might help you to implement this functionality:
In case you have any other questions, please let us know. 
Best regards,
Zeroqode Support Team
