Hello 
It seems that theme component is removed if it fallback to /admin/customize/themes. I am not sure if you reinstall it will help because the id won’t be the same. Maybe something stuck here and show this update available.
However, if it’s stuck than maybe it indicates the update for wrong theme component too. I saw on your video the Last Seen theme component needs an update and it’s not indicated on your dashboard. It worth a try to update that component maybe it will fix it.
Can you check /logs and browser console too? Maybe there are some relevant warning or error.