Troubleshooting Stencil Inconsistencies

Hi everyone, I have been trying to get this custom rose logo onto my SD loaves for many weeks now, and keep getting disappointing results with the Rice flour looking burnt or fully disappearing.  Here are my specs: 80% Bread flour (14% protein), 20% Whole Wheat, 70% total hydration, 25min autolyse, 23% starter, 2.7% salt, bulk fermentation with 3x stretch + fold every 30min. Shaping, proofing for 1-2h, cold storage overnight, stencil + score and bake out of the fridge.  My oven and baking specs:I use a Bakers Pride P44s, so bread bakes on a baking stone, with constant steam injection for 25min at 475f, then dry at 475f for about 10min.  Stenciling:I dust the loaves, apply rice flour on the stencil. I tried spraying and not spraying before baking. 

   The issue:The stencil tends to either stretch and start disappearing after the steaming phase, and is almost gone after the dry phase, or burnt.    Questions:How can I get a much sharper / clearer white stencil to stick to these babies? I am also really curious if someone knows how the baking techniques, amount of steam and temperature affects the result of their stencil.  Thank you all, Francois