We're looking for the answer to part of your question, too Is is possible to get a shopify expert to do some custom code that either prevents images flowing to pos?
We don't want product images in POS.
This is a concern. We have loaded our iPads with upwards of this many items or more for testing. And I thought we linked at least a single image to each item. We didn't run into issues while testing things out. Hope it's more of a temporary glitch in y'all's cases due to the iPads being low on available resources or something!