Hey, I seen your original post. I know a lot of people don't transfer directly to DWC bin right after the seedling has sprouted. You can, however, transfer it, and top water. I know this from experience. I tried to do the same as you, I didn't top water either. I made sure though, that the bubbles popping would hit the hydro-rocks right below the rockwool. It is important that you don't have the water directly touching the rockwool. Anyways, I noticed you sprayed your plant directly with water. I always thought that was a no no. I sprayed the hydrorocks around the plant and rock wool, but never the seedling itself.
In summary, I stunned my plant for a good week by trying to transfer to DWC to early. If you are unsure when to transplant, wait until you have some roots growing out of the rockwool, than you can transfer. I'd still recommend that you top water (not the plant directly) until the roots grow into your res. Hope this helps!