I guess you mean that the material that is purged from the nozzle in the front left corner does get pulled with the head and stick to your model, but on the UM robot it has a skirt where that filament stick instead.
If i get that right, just make sure that you are printing with at least one line of skirt.
Maybe you mean the skirt which makes sure the hotend is well primed. But maybe you could post a picture and show us what exactly you mean?
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