load local data.
At first glance, that does seem like a problem with the dataset. How many datasets are present in the scene?
If you have multiple datasets present in the scene, it would be helpful to isolate only the dataset that is showing the problem.
Also, are there any errors in the Output Log?
Yes,I has many dataset,but at the same time,Only one to be visible.It is a problem of terrain’s local data.But using different local datas often appear this problem,but each different area. I try to use the same local data with web cesium,It is ok.