this is not a very common issue, I suppose, since people usually do not switch from one theme to another often, but I am testing the GeneratePress, see if it works, and then switch back to my old theme, before I will use GeneratePress eventually.
when I am switching from GeneratePress back to another Theme and then return to GeneratePress the text field, with contact info, which I put in the footer widget is no longer shown.
Use Case: I am inserting a text field into the footer widget, with contact info. Then I save and activate the Plugin. The contact info is shown fine. When I switch back to the Theme before and check on GeneratePress, the text field is still shown in the Configuration Side Bar as part of the footer widget, but on the preview website the original footer with the text: “Replace this widget content by going to….” is shown.
When I save and activate then the text field in the footer is ignored and the orginial footer also appears on my site.
So somehow, although saving (and activating), the changes are not persistent when deactivating the theme. In addition the text field is still shown on the left side in the footer, but not recognized.