Problem: The main product image in Shopify has been changed after saving image assignments.

Why this happens:

• In Advanced Settings, if “Overwrite main variant image in admin” is enabled, Rubik will update Shopify’s product data to match the first image you assign to each variant.

How to fix:

• Disable “Overwrite main variant image” in the settings.
• Reassign images manually in Shopify Admin if needed.