System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 445.87

Blender Version
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: rB375c7dc4caf4
Worked: (optional)

Short description of error
When using Knife (k) on N-gon mesh, sometimes (in some particular places) right after first mouse click on edge or near edge, appears long cut from some other side of the mesh.

Exact steps for others to reproduce the error
Open blend file, go to Edit mesh, activate Knife tool (k) and make first click in the circle or somewhere hear it near the outer edge of the mesh. Clicking on some outer edges can make this happen too, though it is some harder to catch.