LyX is doing some strange hyphenation of German words... how can I fix that? I just found some non-working suggestions in google

Thanks a lot for your help!
Amp
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\usepackage[ngerman]{babel}
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\usepackage{lmodern}
\usepackage[headsepline, ilines]{scrpage2}
\pagestyle{scrheadings}
\ihead{}
\ohead{\pagemark}
\chead{}
\cfoot{}
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\usepackage[french,ngerman]{babel}
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\selectlanguage{ngerman}
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\usepackage[german,ngerman]{babel}
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\showhyphens{einer}
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\documentclass{article}
\usepackage[ngerman]{babel}
\usepackage{lmodern}
\begin{document}
\parbox{0.5cm}{ist einer}
\end{document}
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\usepackage[T1]{fontenc}
NEW: TikZ book now 40% off at Amazon.com for a short time.
And: Currently, Packt sells ebooks for $4.99 each if you buy 5 of their over 1000 ebooks. If you choose only a single one, $9.99. How about combining 3 LaTeX books with Python, gnuplot, mathplotlib, Matlab, ChatGPT or other AI books? Epub and PDF. Bundle (3 books, add more for higher discount): https://packt.link/MDH5p