A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Just a hunch: I believe you are pasting as In Line With Text & have the Line Spacing set to an Exact value which isn't sufficient to display the entire object.
Go to Word> Preferences - Edit then change the Insert/Paste Pictures as preference to something other than In line with text. Once you've made the change try pasting the Chart again.
Another approach is to right-click the portion of the Chart & select a different form of Text Wrap, such as Square or Tight.
If my hunch is right but you do want the Chart object to be In Line, instead of applying Text Wrap you'll need to modify the Line Spacing to something other than Exactly... You'll also wind up with a big gap of white space above the line where the Chart is inserted :-)