ID Data merge with images only displaying one photo out of several

I am going crazy over here.

I use data merge all the time, but rarely with images. I'm trying to do meal choice place cards for a client wedding where each card has a first name, last name, and an icon for either beef, chicken, or veggie options. I have the csv file, ID file, and all icons in the same folder.

Consistently, ID only recognizes the beef icon. Chicken and veggie don't show at all (just a blank image frame), but the program definitely thinks they're there - I took them out of the folder and got a flagged pop-up that there were missing image files when I tried to run the merge. Beef continues to work fine.

All icons were exported at the same time and using the same settings, are the same dimensions, and all the file names are set up the same in the csv file. 

I have tried:

• Using relative and absolutel file pathways in the csv (both work, just on beef)
• Using a txt file instead
• Re-exporting the files for chicken and veg 
• Using different settings on the image frame (fill frame proportionally, ideally)
• Resizing and adjusting image frame settings in the finished merged file (in case the image was too big? Even though I know it's not)
• Moving the folder the files are in
• Starting a fresh csv file with three test records - only one for each option
• Updating ID to the latest version
• Restarting ID
• Restarting my laptop

I'm at a loss. It's so inconsistent. If anyone has any insight, I would appreciate it! Screenshots of setup and results below. Thanks 🙂