Break long word in tabular

The first word in a paragraph isn't hyphenated. Use \hspace{0pt} or lualatex whichwill hyphenate also the first word.

\documentclass{article}
\usepackage{array}
\newcolumntype{P}[1]{>{\hspace{0pt}}p{#1}}
\begin{document}
    \begin{tabular}{|P{3.5cm}|p{3.5cm}|}
        \hline
        Header 
        & 
        Header 2\\
        \hline
        Marketingdivisiontesttesttest  
        &
        Some more text\\
        \hline
    \end{tabular}
\end{document}