I'd also suggest looking at and linking to @IzzyOnDroid's great documentation for app devs on what to watch for: gitlab.com/IzzyOnDroid/repo/-/…, which is much more helpful than just creating upstream issues to say "broken, please fix" without detailed steps.

(By the way, if someone wants to try building Reproducible Builds themselves, I'd strongly suggest looking at gitlab.com/IzzyOnDroid/repo/-/…, which powers the #IzzyOnDroid #ReproducibleBuild system, covering over 30% of IoDs 1223 apps already)

Reproducible Builds · Wiki · IzzyOnDroid / repo · GitLab

The F-Droid compatible repo at https://apt.izzysoft.de/fdroid/

^GitLab