I made a peach in Blender that has a single image texture with these settings:
In blender I only see the little black lips (the texture) once as intended:
When i export(packaged gltf without .bin etc) and upload to either my own website or the GLTF viewer it tiles the texture and I see the lips three times:
I’ve imported the asset in two glTF viewers (three.js based gltf-viewer and BabylonJS sandbox) and both render the peach in the same way (repeating the texture three times). Hence, it seems to me that the asset is not exported correctly from Blender.