Suttering prints from SD whenever Pi Zero is installed  

Suttering prints from SD whenever Pi Zero is installed

Looking for some input. I'm not new to printing and am very familiar with OctoPrint and its configuration, but this has me stumped.

After successfully installing Octoprint (via Octopi) and the Pi Zero W according to the official instructions, the MK3 stutters when reading prints from the SD. It will level and home normally, purge, and then stop for a full minute or two. Once the print finally progresses it will pause—seemingly randomly—throughout the print, leaving it with ugly pockmarks where the print head rested.

I have reviewed all of the settings multiple times, and everything works as expected from Octoprint. There is no camera installed.

It feels like some kind of interruption being made by the Pi, but I can't pin it down. I'm probably just missing something obvious somewhere. Can any one assist?

Thanks in advance!