I'm trying to render a 3D avatar using react-three-fiber and React, but I'm experiencing some difficulties with positioning the avatar. As you can see from from the following CodeSandbox https://codesandbox.io/s/vigorous-ardinghelli-ypwjsb?file=/pages/index.js, the top of the avatar's head is not visible when you first render the page. However, if you change the position of the model (e.g. from [0.025, -0.9, 1] to [0.025, -1, 1]) and re-render the page, suddenly the avatar is showing correctly. Why is that?