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Switching from UI to Responsive and back

I’m working on a one page site.
When I click Responsive tab, it shows me the group I’m working on but I cannot move objects.
When I click to go back to UI, I don’t see the group I was working on, and It throws me to a different page instead of the same page I was working on.

P.s.
When grouping 2 objects in UI, it throws me to a different group again.