Get into the ground when zooming

1. A concise explanation of the problem you're experiencing.
I have recently encountered a problem in Cesium. When I zoom the map, I often go under the map. How can I not get into the underground, the effect please look at the appendix

2. A minimal code example. If you've found a bug, this helps us reproduce and repair it.

3. Context. Why do you need to do this? We might know a better way to accomplish your goal.
I want to improve user experience

4. The Cesium version you're using, your operating system and browser.

Hi there,

We have an issue open for this (#5837) and a solution has been proposed (#6012). Keep an eye on both of those, I’ve bumped the issue with this report as well.