Hello 
This isn’t likely anything to do with your import. You might have noticed it at the same time. The text you are seeing comes from the image gallery slider. Have you changed any code on the product page?
Topic summary
Issue: “NaN/-Infinity” text appears on product pages with multiple images, desktop only. User had minor theme edits earlier (e.g., button color), but the problem surfaced after a product import (likely unrelated).
Cause identified: The product media layout is set to “stack,” which doesn’t use a slider. Slider buttons are being rendered anyway—likely due to prior theme code changes—leading to erroneous text/output.
Proposed fixes:
- Preferred: Switch product image gallery to “carousel with thumbnails,” which removes the issue.
- Alternative: If keeping “stack,” hide the stray slider controls via CSS:
#shopify-section-template--21990297403696__main .slider-buttons { display: none !important; }.
Guidance: One advisor cautioned against masking the issue and recommended fixing the slider logic rather than just hiding controls; asked about backups and exact code changes. Collaborator access was granted to investigate.
Evidence: A screenshot was shared to illustrate the “stack vs. carousel” setting central to the fix.
Status: User acknowledged the help and appears satisfied. Resolution is to change to carousel or apply CSS; deeper code cleanup may follow via collaborator access.