This issue occurs while using xcolor to alternate the table color, while also using makecell to put multiple lines in a table cell. In this specific scenario, where a larger cell is in a colored line, the coloring will stop just before the end of the table.
\documentclass{article}
\usepackage[table]{xcolor}
\usepackage{makecell}
\rowcolors{2}{gray!20}{white}
\begin{document}
\begin{tabular}{ |c|c| }
\rowcolor{gray!50}
\hline
\textbf{One} & \textbf{Two}\\
\hline
Text & More Text\\
Even More & \makecell{Multiple \\ Lines}\\
\hline
\end{tabular}
\end{document}





makecellis a good way to make multi-line cells – May 05 '19 at 04:57