Can any level 50 carpenters confirm that this ends the Inner Quiet effect? And does the +% remain after you use Byregot's Blessing the first time?

Example (theoretical):

On a synthesis, I use Inner Quiet then use Hasty Touch 5 times. This should put Byregot's at 100% + (20% x 5) = 200%.

When I use Byregot's the first time, does the efficiency % drop back down? Or does it remain at 200% until the synthesis is complete/failed?