Pretty major bug in Media Encoder v23.1 (build 81) on both Windows and Mac. If you batch export a bunch of interlaced timelines from Premiere, even if everything is set correctly, the resulting file will have bad deinterlacing applied to it. If you click into the export settings and hit OK, the correct interlacing is set, but you must do that for EVERY ITEM in the batch list in order for the exports to be done correctly.
This is a huge pain for our project, which deals with 51 eps of interlaced video.
Thanks for the report. Is it possible to get one of your .eps files for test verification.
Apologies, this one was our screw-up. You can deep-six this thread.