Coming over to ArcGIS Pro from many years of ArcMap, Data Driven Pages never presented this problem to me, but on Map Series in Pro, the labels do not appear the same in the PDF as they do on screen, sheet per sheet.
As per attached, you can see I've highlighted the labels which have moved on export to PDF, which may not look like a huge problem, but then the text to the right highlighted is out of the map extents so this then does pose a problem.
However, there are 12 sheets, and this problem only occurred on 4 of them, although all 12 sheets were exported altogether.
Any ideas why? Or workarounds?