Media Encoder scrambling .mxf footage on output

I am working on a project that includes a lot of 4k .mxf footage captured using a Sony Fx9.  When exporting multicam sequences the .mxf camera is output as a scrambled image (see attached).  The footage will play normally, in the premiere pro timeline, but I cannot seem to be able to get the footage to export properly. 

This has happened in multiple projects in both multi-cam and regular sequences. 

I have tried to delete and re-import the affected clips in Premiere Pro.

I have tried to delete and rebuild the media cache by deleting it from within the app and by manually deleting the cache from the library.

I have updated the sequence settings and switched preview files to quicktime, pro res 422.

I have updated to the latest version of Media Encoder v23.3 Build 57

None of these has worked and I am at wits end - please help! 

Here are my export settings: 

Editing on a 2022 Mac Studio M1 Max system.

Thanks in advance!