@Jared
Yes - it is repeatable. I load a sequence - it shows offset for sync - fails on first attempt. Reset sequence, open up sync method and click offset, run sequence - it works.
link to sequence:
https://www.dropbox.com/s/mekvtubbcoy3dls/Gamma%20Cassiopeiae%20Nebula%20%28IC59%29.sgf?dl=0