People Suggestions i Search box web part

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I have a short question about the search box web part in our search center.

• On the people result search page it shows people name suggestions.
• On the Everything result page (and also on the default search page) it shows no people name suggestions. 
• On all of these pages I have checked the Show people name suggestions in the web part configuration. 

Is it because I have different Result sources on the two pages (Local Sharepoint Results vs Local People Results)? But why does it not show the suggestions on the default-page? We are running our SharePoint in O365 if that makes any difference.