Media Encoder Freezes on 50th Item

I'm attempting to transcode footage (.MXF from Sony FX6) into H.246 format, and I'm doing so by adding the source footage into my Media Encoder queue. For some reason, every time ME hits the 50th video, it freezes - right at the beginning. Has anyone else had this issue? 

I'm not sure if it's specific to the conversion I'm doing now - I've had issues with it freezing while making proxies for me from Premiere Pro. It wasn't until I was running this specific task that I realized it was occuring every time on the 50th video. I've tried this with a few different batches with the same result, so I know it's not specific to a video file (e.g. the file is corrupted). I'm also able to batch transcode 49 files at a time without issue. 

First Attempt:

Mac Pro (2019)

macOS Monterey 12.6

3.2 GHz 16-Core Intel Xeon W

Memory: 192 GB 2933 MHz DDR4

AMD Radeon Pro Vega II 32 GB

Premiere Pro v 23.1

Media Encoder v 23.1

Second Attempt: 

MacBook Pro (16-inch, 2021)

macOS Monterey 12.6

Apple M1 Max

Memory: 64 GB

Premiere Pro v 23.0

Media Encoder v 23.0