Yep, same experience. I use Thunderbird for many years, and tried to migrate my calendar workflow to it many times, and it just does not work. I really like it

Yep, same experience. I use Thunderbird for many years, and tried to migrate my calendar workflow to it many times, and it just does not work. I really like it as an email client, and I'd like to use it as scheduling tool too, but currently it's way too clunky to be of any practical use. Sync issues, UI issues, all kinds of issues. Hopefully they'd get their act together sometime.