You have wicking issues most likely. Silica is not my choice of wicks. Cotton will wick better, hemp is even better and Ramie is my preferred wick of choice. I've only built the Russian twice with silica, when I went micro coils, 8 months ago, went to cotton, and now using ramie.
2 main points of focus is the density of the wick through the coils, to dense and juice can get choked off, to thin and not enough juice can be wicked. Just right, no dry hits. With silica, a losses wrap can cause a hot spot and create dry hits.
The other point of focus is, not getting fiber caught in the threads when securing the containment ring, this can clog the juice channels and lead to dry hits. I fold the wick tails straight up while securing the containment ring, then gently tuck them into the juice decks. Saturate wick, assemble fill and vape. All should be good in the world of vape!!
I vape my Russian at 30 watts with no wicking issues and have a stellar vape.