Component: p-multiSelectItem - breaking regression

[pete-mcwilliams]

Describe the bug

after changes introduced in 17.15.0 template handling, using template checkicon causes an error to be raised on selecting an item in the popup:

vendor.js:41996 ERROR TypeError: templateRef.createEmbeddedViewImpl is not a function
    at ViewContainerRef.createEmbeddedView (vendor.js:52142:33)
    at NgTemplateOutlet.ngOnChanges (vendor.js:28787:40)
    at NgTemplateOutlet.rememberChangeHistoryAndInvokeOnChangesHook (vendor.js:39553:10)
    at callHookInternal (vendor.js:40582:10)
    at callHook (vendor.js:40609:5)
    at callHooks (vendor.js:40566:9)
    at executeInitAndCheckHooks (vendor.js:40521:5)
    at selectIndexInternal (vendor.js:46448:9)
    at Module.ɵɵadvance (vendor.js:46432:3)
    at MultiSelectItem_ng_container_3_span_2_Template (vendor.js:170190:60)

try swapping to itemcheckboxicon error goes but template is ignored.

Environment

reproducible in stackblitz

    "primeng": "17.18.0",
    "@angular-devkit/build-angular": "^18.0.2",
    "@angular/animations": "^18.0.1",
    "@angular/cdk": "^18.0.1",
    "@angular/cli": "^18.0.2",
    "@angular/common": "^18.0.1",
    "@angular/compiler": "^18.0.1",
    "@angular/compiler-cli": "^18.0.1",
    "@angular/core": "^18.0.1",
    "@angular/forms": "^18.0.1",
    "@angular/platform-browser": "^18.0.1",
    "@angular/platform-browser-dynamic": "^18.0.1",
    "@angular/platform-server": "^18.0.1",
    "@angular/router": "^18.0.1",
    "chart.js": "4.4.2",
    "primeflex": "^3.3.1",
    "primeicons": "^7.0.0",
    "quill": "2.0.2",
    "rxjs": "~7.8.1",
    "tslib": "^2.5.0",
    "zone.js": "~0.14.0"

Reproducer

https://stackblitz.com/edit/asbm6h?file=src%2Fapp%2Fmulti-select-basic-demo.html

Angular version

18.0.1

PrimeNG version

17.18.0

Build / Runtime

Angular CLI App

Language

TypeScript

Node version (for AoT issues node --version)

v20.14.0

Browser(s)

No response

Steps to reproduce the behavior

use template for checkicon see that error is raised in console when a checkbox is ticked
use template for itemcheckboxicon see there is no error and the template is ignored.

Expected behavior

No errors templates work, should be able to continue to use checkicon as it is in depreciation and not removed.