New third person default project, nothing has been changed, after running the level, the character will run for a period of time will be stalled, how to solve this problem?

Development Character & Animation
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New third person default project, nothing has been changed, after running the level, the character will run for a period of time will be stalled, how to solve this problem?

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新建的第三人称默认项目，什么都没有更改过，运行关卡后角色跑动一段时间就会卡顿一下，请问这个问题应该怎么解决？