incorrect citation output with biblatex and bibtex8 backend

[KonradHoeffner]

When I compile the following document with pdflatex v3.141592653-2.6-1.40.26 and bibtex or latexmk -pdf v4.83 using texlive 2024.2-3, the citation gets correctly written as Lastname and Anotherlastname 2024.
However when I use tectonic v0.15.0-2 instead (default pacman Arch Linux package "tectonic"), I get the incorrect output “Article Title” 2024.

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[backend=bibtex8,bibencoding=ascii,style=authoryear]{biblatex}
\begin{filecontents}{mwe.bib}
@article{mwe,  
  title={Article Title},
  author={Firstname Lastname and Anotherfirstname Anotherlastname},
  journal={Journalname},
  volume={123},
  number={1},
  pages={1234--2345},
  year={2024}
}
\end{filecontents}
\addbibresource{mwe.bib}
\begin{document}
\cite{mwe}
\printbibliography
\end{document}