I could confirm the issue on your shared site but I have tested it on my test site and it’s working fine for me using latest version of Gillion theme.
Could you please temporary disable autoptimize and any other cache you are using on your site so that i can troubleshoot it?
Also this can be due to plugin conflict on your site so please try temporary deactivating all plugins except Unyson plugin and see whether everything works fine and then enable the plugins one by one to see which plugin is conflicting if any.