Size variation not working using swarmchart

The input argument sz isn't changing marker's size when using swarmchart.

rng(1)
x1 = ones(1,100);
x2 = 2 * ones(1,100);
x3 = 3 * ones(1,100);
y1 = 2 * randn(1,100);
y2 = [randn(1,50) randn(1,50) + 4];
y3 = 5 * randn(1,100) + 5;

swarmchart(x1,y1,5)
hold on
swarmchart(x2,y2,20)
swarmchart(x3,y3,50)
hold off

fig2plotly();

The previous code should plot 3 different series with 3 different marker's size, however, they're all being plotted with the same size.

Expected and generated (https://chart-studio.plotly.com/~xarico10/323/#/) plot:

Examples on using the sz input argument on swarmchart() can be found on:
https://www.mathworks.com/help/matlab/ref/swarmchart.html#mw_ea7dfc24-dc30-4f02-83a9-eb9d20bb2748

Start by running the provided swarmchart example and comparing its output before and after fig2plotly(). Trace how fig2plotly() handles the swarmchart sz input for the three series. Done means the generated plot preserves visibly different marker sizes for values 5, 20, and 50.