FYI Aurender Owners.
It's NOT the DAC after all. After getting familiar with the Aurender set up and output options I figured out what was going on.
In the Aurender settings in the Main Square Aurender Tab , displaying Library there is an antenna or flag shaped Icon. Click and you will see DSD and 24 bit icons
Click and hold and a menu will pop up for each. It will allow you to turn off DSD output and limit to whatever sample rate you need. For me I turned off 384k and sync problem went away.