Bug with points?

I’ve tried this very simple code during a Processing introduction course
One of the students has a windows machine with a windows build 1904.1466 on it
it turns out that the drawn line (so the points) at the last part is thinner than the rest of it. Is this explainable?

Thanks
size(600,400);
int x=0;
while (x<width) {
println(x);
point(x, 25);
x=x+1;
}

oops, btw forgot to mention we used the latest Processing version 4.0 Beta 5