When clicking any podcast, Amarok instantly crashes. I get no error messages, and no crash report dialog. I don't even get anything when running it in gdb. I have gotten some Systemd coredumps though, if that would help (though I'm worried about the gPodder password). Furthermore, it seems every tome it happens, the number of podcasts increases, and there are now tons of duplicates. These podcasts are synced from gPodder, though they are shown both under gPodder podcasts and under local podcasts. I also don't seem to be able to remove the podcasts. I clicked remove on the once, but nothing happened, and now that option is missing. Also, sometimes Amarok will take up 100% CPU and get all laggy, while saying it is fetching the podcasts.
Please do not report more than one issue in a bug report. For a crash, we need a crash backtrace with debugging symbols enabled, provided the crash is reproducible. See also https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports