Carousel: custom template for header not rendered

[Kue2]

Describe the bug

Starting with PrimeNG 18, custom template passed through content projection into p-carousel for header is no longer rendered, unlike the custom footer which still renders correctly.
See https://stackblitz.com/edit/f5r18n2c?file=src%2Fapp%2Fcarousel-basic-demo.html

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/f5r18n2c?file=src%2Fapp%2Fcarousel-basic-demo.html

Environment

Prime 19
Angular 19

Angular version

19

PrimeNG version

v19

Node version

No response

Browser(s)

Chrome

Steps to reproduce the behavior

Add a custom header to p-carousel

<p-carousel
[value]="products"
[numVisible]="3"
[numScroll]="3"
[circular]="false"
[responsiveOptions]="responsiveOptions"

<!-- custom header -->
<ng-template pTemplate="header">
  <div style="background-color: yellow">Custom Header here!!</div>
</ng-template>

Expected behavior

An element with "Custom Header here!!" text is rendered before the carousel

[Kue2]

Resolved by using #header in place of pTemplate="header" as identifier for ng-template

<!-- NOT WORKING custom header -->
<ng-template pTemplate="header">
  <div style="background-color: yellow">Custom Header here!!</div>
</ng-template>


<!-- WORKING custom header -->
<ng-template #header>
  <div style="background-color: yellow">Custom Header here!!</div>
</ng-template>