Can confirm, position rewinder wipes check points and is now utterly useless in aiding in completing this horrific jumping puzzle unless the return point and rewind are practically next to each other. Seriously, making this a requirement for completing Return to Ember Bay was hateful enough, but now you can't really use teleport-to-friend or position rewinder to make it easier to get to the check points/finish this jumping puzzle with out the risk of it wiping your progress. The fact that if the teleport/rewind/portals are too far apart they cause a loading screen which in turn wipes your check points is ridiculous.