Axis properties not changing graph's behavior

[grassjelly]

I'm trying to modify my graph's axis properties as the label and grid lines don't appear. Assigned some numbers but doesn't seem to change anything on the graph.

Here's my code. Data is updated dynamically in a callback where I pass a vector to line.x and line.y:

xpl::figure fig;
xpl::linear_scale sx, sy;
xpl::lines line(sx, sy);
line.colors = std::vector<std::string>({"blue"});

xpl::axis hx(sx), hy(sy);
hx.grid_lines = "solid";
hx.label = "x";
hx.label = "y";
hx.color = "#060482";

hx.grid_color = "#060482";
hy.orientation = "vertical";
hy.grid_lines = "solid";
hy.side = "left";

fig.add_axis(hx);
fig.add_axis(hy);

fig.add_mark(line);
fig

Output graph:

Here's my package versions running on Ubuntu 18.04 running on conda version 4.8.3

Thank you!