Sorry to hear of the problem you are having.
I have tested it on my test site and it’s working fine for me using latest version of Gillion theme.
Are you using HTTPS on your site?
Do you mean you are getting this issue since using child theme and work fine using Gillion theme?
Would you mind if i log in to your site and do some troubleshooting? If this is ok then could you please share me your site log in details privately by adding them in the box having text “Click here to share private content. Only you and forum moderators will be able see it.”?