Cause
This is a very common issue faced by 9 out of 10 SharePoint developers. The custom site Logo is not reflected on the Web Part Page and hence the default logo is seen as shown in the screenshot:
Home Page
NewTestPage (WebPartPage)
Solution
- Go to the Web part (NewTestPage) page.
- Click on the "Page" tab at the top, click on the "Title Bar Properties" at the right (in the ribbon).
- In the Image Link section on the right, paste in the image URL:
- Click OK.
Out Page: Web part Page