Mail thread marks itself as unread immediately after I mark it as read
Since Geary 3.36.0, when I right click on a mail thread and 'Mark as Read', the mail thread often briefly marks itself as read (unbolds) for a fraction of a second, then toggles back to unread (bold). Example screencast:
Screencast_from_04-06-2020_09_26_48_AMSee:
This also occurs using a GMail account (though the example video is using a Dovecot server) and it's a regression from Geary 3.34.