Seems pretty obvious as a failure. Even some sort of simple motion detection below where the print head moves would have detected this.
You got.an P1S? Or what do you own?
I have an X1C. (Posts must contain more than 25 characters I guess.)
What sensitivity setting do you have “spaghetti detection” on? It looks like you cancelled parts of the print? A cancelled part may turn off the spaghetti detection. Come to think of it I have only had it error on prints without cancelled parts. Usually it works pretty well with light colour filament. I have found it struggles more with dark/black filaments.
2 Likes
iam on the latest Firmware.
My X1C detects nothing.
Problem was the filament stuck between sensor and gear. (false load from me)
He make Filament calibration and 1 Layer with no errors 
So i thing this feature is shitty xD
No cancelled parts, they were done, so I took them off the bed.
Detection is set to “High”.