Simple extrusion of workplane on face of solid results in error

[henrebotha]

System information

• SolveSpace version: 3.1~70bde63c
• Operating system: Xubuntu 22.04

Expected behavior

After extruding the final sketch (g006), no faces should have errors.

Actual behavior

The northern face of the extrusion is marked in red as an error.

Additional information

extrusion-error.zip

This happens no matter how I try to create a workplane on top of g005. The only thing that prevents the error is offsetting my workplane from the surface of g005 by some fractional value.