I had three completed downloads of this episode in the Sonarr queue none of which were processed because of the TBA episode title.
I was able to manually import the last one.
The problem is there because the episode titles are blank in the tvdb.
Episode 1 has now had a title added but all the rest are still blank.
I see someone asked on thetvdb forum if placeholder names of “episode 1” etc could be put into the titles.
As is expected now; the moderators on the site have refused to do this and are planning on leaving the entries blank until the episode title is known.
Even more reason why more consideration needs to be given to moving away from thetvdb.