In the answer to When we say "עַל צִיצִת הַכָּנָף" at which point do we kiss the tzitzis? we were told that it is the Chabad Minhag to kiss the tzitzit six times, at the words tzitzit, tzitzit, l'tzitzit, emet, kayemet and la'ad.
It seems to be a widespread minhag to let go the tzitzis at נֶאֱמָנִים וְנֶחֱמָדִים לָעַד. Why is that?
I have seen another custom, to let them go at וַיְכַסּוּ מַיִם צָרֵיהֶם. Why?