I noticed while I was watching the finished and rendered stuff that some chapters were clipped by 3 seconds at the end. Enough to cut off the ends of the last sentences.
Therefore I’m uploading the show now, but will rerender a new one today without this glitch.
Update: The glitch is inherent to Premiere: It simply cuts out the last 2 seconds of audio from every clip. Therefore I re-recorded myself saying those last few words in each chapter. Also made a little change to the credits.