Describe the bug

The #filtericon template for TreeSelect component is not working as described in the official documentation. Despite providing a custom <ng-template #filtericon>, the default filter icon (pi pi-filter) is always rendered instead of the custom content.

Pull Request Link

No response

Reason for not contributing a PR

• Lack of time
• Unsure how to implement the fix/feature
• Difficulty understanding the codebase
• Other

Other Reason

No response

Reproducer

https://stackblitz.com/edit/eswupexy?file=src%2Fapp%2Ftreeselect-basic-demo.ts

Environment

https://stackblitz.com/edit/eswupexy?file=src%2Fapp%2Ftreeselect-basic-demo.ts,package.json

Angular version

21

PrimeNG version

v21

Node version

No response

Browser(s)

No response

Steps to reproduce the behavior

Create a p-treeSelect with [filter]="true".
Add a custom template:

<ng-template #filtericon>
  <span>Custom Filter Icon</span>
</ng-template>

Open the dropdown.
Observe that the default icon is shown, not the custom one.

Expected behavior

The content of #filtericon template should replace the default filter icon

The #closeicon template is also affected.