Hyaluronidase on encapsulated fillers?

I am not sure where you got your information, but there are 2 glaring misconceptions in your question. First, there is no way to prevent hyaluronidase from affecting your native hyaluronic acid. However, that effect merely allows the product to spread further by lysing the structure holding cells together. It does nor affect your collagen or other skin or soft tissue structures. All other hyaluronic acid is converted into collagen or elastin, etc. which is not affected by the hyaluronidase. Secondly, hyaluronic acid fillers do not become encapsulated. Even if they did, injecting the hyaluronidase into the area of the filler would dissolve some of the filler, depending on how well the way the filler is made resists the action. (The way the hyaluronic acid is bound together is the difference between fillers and how long they last.) For whatever problems you are having, make sure you see a true expert in the use of the filler and hyaluronidase. Although I consider myself an expert in the latter, In the last 19 years (as long as hyaluronic acid fillers have been around) I have only dissolved it twice and one of those had the filler injected by someone else.