Remove blank space following a part (\part)

Question

I'm having trouble removing the blank space after starting a new part.

What I ideally want is for my text to appear straight after my part heading, i.e.:

Introduction

TextTextText

However Latex is inserting blank space 'til the end of the page after a new section starts, as shown here:

How can I make it so that the text begins straight after the part's heading?

Here is a sample of my code:

\documentclass[a4paper,12pt,oneside,parskip=full,BCOR10mm]{scrbook}
\usepackage[utf8]{inputenc}
\usepackage[compact]{titlesec}
\usepackage{etoolbox}
\usepackage{multicol}
\titlespacing{\part}{0pt}{-48pt}{0pt}
\titlespacing{\chapter}{0pt}{-48pt}{0pt}
\titlespacing{\section}{0pt}{-48pt}{0pt} 
\AtBeginDocument{
  \setlength\abovedisplayskip{0pt}
  \setlength\belowdisplayskip{0pt}}
\titleformat{\part}[display]
  {\normalfont\bfseries}{}{0pt}{\huge}
\titleformat{\chapter}[block]
  {\normalfont\bfseries}{}{0pt}{\LARGE}
\titleformat{\section}[display]
  {\normalfont\bfseries}{}{0pt}{\Large}
\titleformat{\subsection}[display]
  {\normalfont\bfseries}{}{0pt}{\large}
\setcounter{tocdepth}{0}
\title{Title}
\author{Name}
\date{November 2021}
\begin{document}
\maketitle
\part*{Introduction}
TextTextTextTextTextTextTextTextTextTextTextTextText
TextTextTextTextTextTextTextTextTextTextTextTextText
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TextTextTextTextTextTextTextTextTextTextTextTextText
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