We upgraded to latest InDesign and suddenly have trouble with interactive pdfs - forward and backward buttons give unexpected results. Same template worked fine with earlier versions.
No problems here. Have you tried restoring your InDesign preferences and recreating to see if the problem goes away?
Trash, Replace, Reset, or Restore the application Preferences
If it's only in one file, perhaps the file has been corrupted. Try saving as an IDML, and reopening the file.
Retrieving data ...