Transforming from "EPSG:4326" to "EPSG:3857" results in precision error

[mvodas]

When transforming from WGS 84 "EPSG:4326" to WGS 84 / Pseudo-Mercator "EPSG:3857" with lon = 0.0 and lat = 0.0 the result is x = 0.0 and y = -7.081154551613622E-10.
The correct value for y should be 0.0, but there is a precision error. Apache SIS gives the correct result. The precision error is there with all other lon/lat inputs that I have tried.
I use Java 17 and proj4j 1.3.0.
Is there any explanation on this or plans for a fix?