Exception thrown by children.ChildContainers in VisualTask when calling AddDivider

[bianjingshiyi]

Describe the bug
As my title described.

To Reproduce
Steps to reproduce the behavior:

1. Create a C# MonoBehavior script.
2. Add a BehaviorTree field.
3. Build tree in Awake as the following script:
   new BehaviorTreeBuilder(gameObject).Sequence()
   .WaitTime(1)
   .ReturnSuccess()
   .End().Build()
4. Click ViewTree button in inspector, see error.

Expected behavior
Throw IndexOutOfRangeException, can be seen in console log.

Desktop (please complete the following information):

• OS: [Windows]
• Exact Unity Version [2022 LTS]