ProRes export takes forever

I've had this issue for some time - throughout V24 and now V25.

If I export a 30 sec sequence file from Premiere as ProRes, it takes seconds.

If I send the same sequence to Media Encoder, it takes up to 10 minutes to encode as ProRes.

I'm using smart rendering, which as I said works great exporting directly from Premiere.

But in Media Encoder it takes forever.

I've compared my settings in both ME and Premiere and they're identical.

30 second commercial, not a problem exporting from Premiere but I also have 1 hour programs that I would

like to be exporting from ME so I can keep working in Premiere.

Incidentally, both Premiere and ME encode h264 with no problems. It seems to be ProRes in ME that's the issue.

Thoughts?

Studio M2 Ultra

24 core

64 GB RAM