Dropdown: p-input-filled does not style correctly

[AquaticLava]

Describe the bug

Dropdown doesn't get fully filled in when using p-input-filled.

Reproducer

https://stackblitz.com/edit/vitejs-vite-9w6sgxa7?file=src%2FApp.tsx,src%2FApp.css

System Information

System:
    OS: Linux 6.12 Fedora Linux 41 (KDE Plasma)
    CPU: (8) x64 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz
    Memory: 42.85 GB / 62.58 GB
    Container: Yes
    Shell: 5.2.32 - /bin/bash
  Binaries:
    Node: 22.11.0 - ~/.nvm/versions/node/v22.11.0/bin/node
    npm: 10.9.0 - ~/.nvm/versions/node/v22.11.0/bin/npm
    pnpm: 9.13.2 - ~/.nvm/versions/node/v22.11.0/bin/pnpm
  npmPackages:
    react: ^18.3.1 => 18.3.1

Steps to reproduce the behavior

load the project. Dropdown arrow isn't filled in.

Expected behavior

Dropdown to be fully filled in as it is in where the placehoder text is.