I have this recurring issue: the knife tool is fucked up because it is snaping to the 3D cursor. Visualy: the green square of the first vertex is located in the 3D cursor.
The tool is therefore useless, nothing is cut. No modeling possible.
I had this issue before, I think I solved it by switching from modeling to shading mode and back. How ridiculous is this. like dancing for rain.
If I start a new scene it is ok, the tool works on defaut cube.
But I cant find how and why in my actual working scene, so bored!