Multitrack - Mixdown Entire Session To New File creates a gap at the end of the file.

I have a multitrack session with two tracks. When I mixdown the session there is an added gap of about 30s at the end of the file every time, even though there is no audio data in that part. I haven't used any reverb or other effects which would cause some kind of tail-off. I am on a Macbook Pro with the M2 Pro chip and 16GB ram, running Audition 24.6.3.2. I haven't had this issue on an M1 macbook or Windows machine in previous versions. Is there a setting or such to avoid adding the additional silence at the end?