Issue in LyX 2.3.6.1 with \maketitle and \uppertitleback

[Michael Ruder]

Hi,

I just upgraded to LyX 2.3.6.1 and have an issue with \uppertitleback and
multiple \maketitle. This issue did not exist in LyX 2.3.5 and before.

Attached is a small sample file. I could reproduce with scrartcl with
titlepage=true and two side document or scrreprt (I did not test other
styles). In the exported TeX source the issue can be seen.

I used a table in the \uppertitleback area (we use a revision history
there for documents) and then a \maketitle is added to every column and
line in the \uppertitleback.

Thanks for working on the great tool, we enjoy using it for many years
already!

Best regards,
--
.      -Michael
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%% LyX 2.3.6.1 created this file.  For more info, see http://www.lyx.org/.
%% Do not edit unless you really know what you are doing.
\documentclass[twoside,english]{scrreprt}
\usepackage[T1]{fontenc}
\usepackage[latin9]{inputenc}
\setcounter{secnumdepth}{3}
\setcounter{tocdepth}{3}

\makeatletter

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% LyX specific LaTeX commands.
%% Because html converters don't know tabularnewline
\providecommand{\tabularnewline}{\\}

\makeatother

\usepackage{babel}
\begin{document}
\title{Titel}
\lowertitleback{%
\begin{tabular}{|c|c|}
\hline 
\maketitle
Table & \maketitle
as\tabularnewline
\hline 
\hline 
\maketitle
Uppertitleback & \maketitle
\tabularnewline
\hline 
\end{tabular}}
\maketitle

\section{Section}

text
\end{document}