Do not auto-download APKs that are signed with a different key than the installed version

I have F-Droid set to auto-download app updates, but it downloads updates for apps that I have installed via the Google Play Store.

I do not expect that F-Droid should try to update APKs with ones that are not signed with the same key, because that would cause an error.

Should the auto-download feature check whether the current and new APK keys match before downloading the APK?