Mixdown only exporting select clips

I am using Audition 2025 on a Windows 11 laptop. I recently just spent a week of time on imaging a bunch of legal ID's and sweepers in a session. I was able to mix down the session and save all the pieces as individual files, but When I opened the session the next day, all the files are in the multitrack session, but a lot of them show no audio. In addition, when I try to play back the audio that shows audio on the track, there is no sound coming out. I've checked hardware settings, made sure nothing was muted on the audio inputs or outputs, checked the audio channel mapping, tried relinking the media to the files and nothing has worked.  I checked the backup folder to open a previous session and it does not have any backups saved from previous days. Only the day I first started the session. Nothing is uploaded on Adobe Creative Cloud which is supposed to occur once sessions have been completed.. Other sessions I have opened up are working just fine. Has anyone else experienced this issue and if so, what was your fix for it? Thanks in advance!