Mobile-redirect problem

Dear Nobita,

thank you for your great support. Always.
I’m still fighting with the very last encountered problem on RainDrops (Only two actually ?? )

I’m redirecting the site to a sub-directory where WP-RainDrops are installed and properly working. https://www.mysite.com/web
As you can see from the links below, my problem is on mobile requesting the site.
If mobile request is made at everything is ok and the site is mobile responsive.
If mobile request is made at + redirect (.index file) only the full site is shown.

Could you help me on this last issue?

Thank you very much for your time on my topics.

Respect,
Justin