Business & farm
When I aggregated 4 businesses together in TurboTax, and "print/previewed" the Schedule B, I got the same result. Note, however, that the PDF includes a "Continuation Statement" with the title "Additional information from your 2019 Federal Tax Return". It shows in the PDF bookmarks as "Additional Information". That Additional Information Continuation Statement has the other two businesses listed.
The reason TurboTax does this is that the actual IRS Form 8995A Schedule B form doesn't have "room" for more than two businesses, so this additional information statement is needed.
Here is a screenshot if the heading for that Additional Information statement:
