Blender 2.8 snap, knife tool does not work properly

Question

Have installed Ubuntu 18, Blender 2.82.7

1. Vertex extrusion to edge with snap enabled has gap (snap vertex to vertex is ok)

2. Knife tool does not work with vertices on face

How i can solve it? I am using Blender for 3D-printing.

Best regards, Viktor.

UPDATED: Have tried plane. Made 2 edges. Intersect with tinyCad. But plane was not cutted by 4 triangles, and still no snap in the center edge intersection point.

UPDATED2: J works for intersection. But for vertices on edge/face it does not.

Answer 1

The snapping issue is a limitation, just realized some time ago and found this: https://developer.blender.org/T66422 Try using the built-in tinyCAD addon, it's very useful.