swarmchart not working correctly (doesn't present any jittering)

When using swarmchart() data is supposed to be offset (jittered) in the x-dimension for easier visualization. However, this isn't happening and data is just being plotted and stacked on its original value:

For example:

rng(1)

x = [ones(1,500) 2*ones(1,500) 3*ones(1,500)];
y1 = 2 * randn(1,500);
y2 = 3 * randn(1,500) + 5;
y3 = 5 * randn(1,500) + 5;
y = [y1 y2 y3];
swarmchart(x,y)

fig2plotly();

Expected and generated (https://chart-studio.plotly.com/~xarico10/337/#/) plots:

Examples on using swarmchart() can be found on:
https://www.mathworks.com/help/matlab/ref/swarmchart.html#responsive_offcanvas