Have you made any changes in the Jevelin theme files?
If you make changes in the theme file then you have to make these changes again after theme updation as changes made in the theme files get lost on theme updation therefore using child theme to make changes is recommended.
If you have any questions not related to this topic then to help us keep support thread separates could you please create your own thread for your question instead of replying on others thread as it makes the thread messy and hard to read.
If you want to you can also add reference of this thread in your newly created thread.
We would be more than happy to help you on your new thread.