I downloaded the model Window-Door frame-Door Sign-Wallart Cat Love and opened it up in Bambu Studio. When I sliced it I saw this very odd line of filament inserted. Since I wondered if something went wrong in the download, I clicked the open in Bambu Studio link and still had this strange line appear when I slice the model.
I opened the file in Orca Slicer and sliced and printed without issue.
Does anyone know what this is or why it happened? I’ve learned that Orca doesn’t always play well with the .3mf files downloaded from Bambu so I’ve taken to opening them in Bambu these days.