Could you please deactivate all plugins that have not been installed with your theme during its setup and all existing custom PHP code snippets? And then, could you confirm me that the issue is still persisting please?
Please also make sure that you have the latest theme version and that all recommended plugins are up-to-date. Finally, you could also consider clearing all activated caching system as well as your browser cache before investigating any further.
We’re waiting for your feedback. 🙂