Bug: 使用关联高亮时候，如果有节点icon是图片，另外节点hover上会显示该图片

**Describe the bug**

**To Reproduce**
https://codesandbox.io/s/ecstatic-mccarthy-ppn2w?file=/App.tsx

**Expected behavior**
正常显示节点，icon不管是font还是image。不关联则不显示

**Desktop (please complete the following information):**
- OS: [e.g. iOS]
- Browser [e.g. chrome, safari]
- Version [e.g. 22]

**Additional context**
Add any other context about the problem here.

Start with the linked CodeSandbox reproduction, especially App.tsx, and trace how associated highlighting handles node icons. Verify the behavior with both font and image icons, then confirm that unrelated nodes do not display another node's image while the node itself remains normally rendered.

Written by the indexing model from the issue text.