Report page changing size

Hello,

I have 4 different pages on a report that I made in PBI Desktop and the first page has the "Page View" button greyed out. But, if I copy and paste the contents of the first page to a new page, then it works fine. Is the first page suppose to act as a cover page or is this a bug?

Update: If I publish the report to PBI Service and pin the pages to a Dashboard, the first page is much smaller than the other pages, and if I drag the corner to expand it, I just get more white space on the sides.

This is from the first page of the report in PBI Desktop:

Help please,

Alan