Wirecast NDI output, audio ahead of video

Wirecast 14.3, Windows 21H1, NDI tools 4.5 installed.  i7-6700, 48GB ram, 2x 1TB M.2 drives, Geforce 1080ti graphics, magewell 4 input SDI capture card.

New document, add an .MP4 video file.  When outputting via Wirecast NDI, the audio precedes the video by around .25 - .3 seconds.  If I play the file on windows media player and send it using NDI scan converter they line up.  I've tried multiple windows, macos, and a birddog receiving devices and they all agree.  

Similarly, with Wirecast 14.3, MacOS 11.5.2, on a 2018 15" Macbook pro; NDI audio output is ahead by around half of what the windows machine is, around .125 or so 

On both of these systems, disk record and streaming are in sync.  So encoder and NDI output are pulling audio from different points in the processing? Is there a way to get NDI audio output in sync?  Any thoughts on why the windows machine is farther out of sync?

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