Make TeXstudio not break the page at a new chapter

Question

I'm having trouble using TeXstudio with the template of my university (see code below). I need to use the command \chapter for every new chapter (obviously), so the numbering won't start with 0 because the documentclass is scrbook. Apparently I'm using a KOMA-script based document class.

My issue now is, everytime a new chapter is opened, TeXstudio clears the whole page, which leaves big gaps inbetween the end of the current chapter and the beginning of the new one.

How can I fix that, so that the new chapter begins right after the current one on the same page?

If anyone asks, no I am not able to use another package/template or something else. We have to use this template for our bachelor thesis. I just wanna change this one problem!

Code:

\documentclass[a4paper, 11pt, twoside, openany, DIV15, BCOR15mm]{scrbook}
\KOMAoptions{cleardoublepage=empty}
%
% Packages
\usepackage{hanser}
\usepackage{textcomp}
\usepackage{listings}

\usepackage{hyperref}
\clubpenalty = 10000
\widowpenalty = 10000 \displaywidowpenalty = 10000

\parindent0.0cm
\parskip1.5ex

\bibliographystyle{geralpha}

\setcounter{secnumdepth}{2}
\setcounter{tocdepth}{2}


\definecolor{codecolor}{rgb}{0.85,0.85,0.85}
\lstloadlanguages{[ANSI]C++, Java}
\lstset{basicstyle = \ttfamily \small}
\lstset{backgroundcolor=\color{codecolor}}
\lstset{extendedchars=true} \lstset{showstringspaces = false}

\raggedbottom
\setlength{\parskip}{2.0ex}
\setlength{\parindent}{0.0cm}

\pagestyle{fancy}
\renewcommand{\chaptermark}[1]{\markboth{#1}{}}
\renewcommand{\sectionmark}[1]{\markright{\thesection\ #1}}
\fancyhf{} \fancyhead[L, RO]{\small \thepage}
\fancyhead[LO]{\small \nouppercase  \leftmark}
\fancyhead[RE]{\small \nouppercase \rightmark}
\fancypagestyle{plain}{%
    \fancyhead{} %
    \renewcommand{\headrulewidth}{0pt} %
}

\setlength\abovecaptionskip          {0.4em}
\setlength\belowcaptionskip          {0.2em}

\renewcommand{\floatpagefraction}{0.99}
\raggedbottom

\begin{document}
\thispagestyle{empty}
\title{Aufbau eines Ticketsystems (Arbeitstitel)}
\date{11.~Juli~2018}
\author{, }
\maketitle

\pagenumbering{roman}
\tableofcontents

\pagenumbering{arabic}

...

\end{document}