Thanks for writing in!
I am not sure what does mean by different sites, you mean to say the mobile menu doesn’t work?
If so that can be fixed by updating the theme.
As you mentioned you are using 5.2.2 of X theme, the available version is 6.1.5. If your site validated then it update should show in your dashboard. Also you can do manual update too.
Please check the update guide.
If that doesn’t help please send us your login details in a secure note so that we can have a look.