Do I always have to re analyze my serato library after I sync from Lexicon?

Every time I sync from Lexicon to Serato my smart crates become regular crates and if they do manage to remain smart crates no music is in them unless I re analyze my music.

If you use smartlist rules that Serato does not know about, then Lexicon automatically turns them into normal crates, so that is normal.

I don’t know what you mean by needing to analyze your music for tracks to appear in your crates. Can you make a video of that or some screenshots?