Issues with AAFs created in Premiere Pro 2018
In PP 2018 there have been issues exporting AAFs for use in ProTools.
Once the AAFs are imported into ProTools the position of audio files on the timeline will have slipped out of place on several tracks.
Never had this issue with PP2017.
Trevor Asquerthian commented
http://duc.avid.com/showthread.php?p=2507113 - ProTools folks having AAF from PP issues