I am using default print format and the item description is overlaping to the description heading in the 2nd, 3rd page when i generate pdf. 1st page is okay.
You might want to check if the line height or margin values got tweaked in the default item table template. I’ve hit similar weirdness where page 1 looks fine but later pages squish things together. Switching the print format to Jinja and adding a small margin-top on the description block fixed it for me. Also try disabling compact item print in Print Settings to see if it stops the overlap.