VirtualScroller: Unstyled mode broke core functionality

[ITSFerroli]

Describe the bug

When the unstyle mode is set to true, the VirtualScroller component, and all others that use it (e.g., MultiSelect, etc.), do not function as they should.

Reproducer

https://stackblitz.com/~/github.com/ITSFerroli/vitejs-vite-txpng6

PrimeVue version

4.0.4

Vue version

3.x

Language

ES6

Build / Runtime

Vite

Browser(s)

No response

Steps to reproduce the behavior

Please refer to the issue at the provided link and try updating the unstyle parameter in the main.js file. If it is set to false, the VirtualScroller works correctly; if it is set to true, it does not.

Expected behavior

No response