Does " ST_Intersect" work in 3d truly?

I am using "ST_INtersection" between two 3D line which are not in a height and I think they should not intersect together, but the result give their intersection.

SELECT ST_ASText(ST_Intersection( ST_GeomFromText('LINESTRING( 1 1 1, 5 5 1)'), ST_GeomFromText('LINESTRING( 4 1 10, 1 5 10)'

)));

result:

"POINT Z (2.71428571428571 2.71428571428571 5.5)"