I remember reading on the rppgnet forums that if the Strix is ejected or destroyed, it still leaves behind a tiny bit of itself that is too small to make any difference. But...

There's this line on p. 234 "Some Kindred theorize that the minds of the Strix become confused when not in host bodies, warping memory the way some disorders affect Kindred in torpor."

So maybe we can say that a Strix's memories of their time unembodied aren't as stable as the memories they create and access while embodied. If so, it might be a fun plot to have a human survive a Synthesis
...