A Mysterious Line Appears Outside the Z-Seam in My Prints

Hello friends,
When I take prints from my 3D printer, I notice a line appearing on my prints besides the regular Z-seam. This line starts to fade a bit when I reduce the flow rate, but when I return to the normal desired flow level, it appears again. Even when I lower the flow rate, I can’t completely eliminate it.
So far, I’ve especially noticed a lot of these line marks at the points where my objects pause halfway and then continue printing.
What could be causing this issue? How can I fix it?


Could you please help me?


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Although I think it’s odd that it would be on the horizontal plane, these remind me of the seams that BambuStudio will show you in your sliced print. See if they match up, and there are settings there somewhere to move them around. (Seams are where the movement path of the nozzle always ends and meets the other end of the path)
But I still think its strange to see seams on the top. It’s usually on sides of a print, so it might not be that.

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Looks to me like both flow and PA are too high. Do a manual cal of the filament.

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It looks like the artifacts you get from when you have Process → Other → Gcode Output → “Reduce Infill Retraction” enabled.

I think what you’re seeing is ooze from the unretracted travel on the top-minus-1-layer, entombed from the top-layer.

Its a bad name for the feature IMO