We are sorry for the trouble. As described, picture span pages when printing web pages.
The core of a web page is a file written in Hypertext Markup Language (HTML). Typically, the HTML file includes associations with other files that either appear on the web page or govern how it looks or works.
When you convert a web page to PDF, the HTML file and all associated files—such as JPEG images, Adobe FLA files, cascading style sheets, text files, image maps, and forms—are included in the conversion process.
Would you mind sharing the steps you are doing to print the web pages to PDF?
Please try to create the PDF from the Acrobat DC file menu > Create > PDF from Web page and see if that makes any difference.
What is the version of the Adobe Acrobat DC you are using? To check the version go to Help > About Adobe Acrobat and make sure that you have the latest version 20.12.20043 installed. Go to Help > Check for Updates.