Can't display patches with mplleaflet - python-3.x

Question

I'm trying to display a circle of fixed size in a leaflet map.
I tried with .add_artist()(see here) and I'm now trying with .add_patch()
import mplleaflet
import matplotlib.pyplot as plt
import matplotlib as mpl
fig, ax = plt.subplots()
x = 2.363561
y = 48.951918
r = 20
circle1 = mpl.patches.Circle((x,y), radius=r)
circle2= plt.Circle((x, y), r, color='r')
#ax.add_patch(circle1)
#ax.add_patch(circle2)
mplleaflet.show(fig=ax.figure)
You can try to uncomment one of the two commented lines, it doesn't matter which line is uncommented, same error pops.
Here is the trace I get :
Traceback (most recent call last):
File "<ipython-input-81-1fdd7f4a9d12>", line 16, in <module>
mplleaflet.show(fig = ax.figure)
File "C:\ProgramData\Anaconda3\lib\site-packages\mplleaflet\_display.py", line 180, in show
save_html(fig, fileobj=f, **kwargs)
File "C:\ProgramData\Anaconda3\lib\site-packages\mplleaflet\_display.py", line 131, in save_html
html = fig_to_html(fig, **kwargs)
File "C:\ProgramData\Anaconda3\lib\site-packages\mplleaflet\_display.py", line 84, in fig_to_html
exporter.run(fig)
File "C:\ProgramData\Anaconda3\lib\site-packages\mplleaflet\mplexporter\exporter.py", line 51, in run
self.crawl_fig(fig)
File "C:\ProgramData\Anaconda3\lib\site-packages\mplleaflet\mplexporter\exporter.py", line 118, in crawl_fig
self.crawl_ax(ax)
File "C:\ProgramData\Anaconda3\lib\site-packages\mplleaflet\mplexporter\exporter.py", line 138, in crawl_ax
self.draw_patch(ax, patch)
File "C:\ProgramData\Anaconda3\lib\site-packages\mplleaflet\mplexporter\exporter.py", line 227, in draw_patch
mplobj=patch)
File "C:\ProgramData\Anaconda3\lib\site-packages\mplleaflet\leaflet_renderer.py", line 125, in draw_path
rings = list(iter_rings(data, pathcodes))
File "C:\ProgramData\Anaconda3\lib\site-packages\mplleaflet\utils.py", line 14, in iter_rings
raise ValueError('Unrecognized code: {}'.format(code))
ValueError: Unrecognized code: C
Any idea on how to solve this ?
===========================
EDIT :
Just to see what would happen, I tried doing the same thing than this, which is changing
elif code == 'L': ring.append(point)
to
elif code == 'L' or code == 'Z' or code == 'S' or code == 'C': ring.append(point)
in mplleaflet\utils.py, line 11 and 12. Here is what I got :
===========================
EDIT 2 to answer comment
mpl.patches.Rectangle and plt.Rectangle show up :
rect1 = mpl.patches.Rectangle((x,y), 1, 1, color = 'r')
rect2 = plt.Rectangle((x, y), 1, 1, fc='r')
Which seems to fit with a rectangle of 1 degree in latitude and 1 degree longitude (see here) (maybe ? Seems a bit small).
As for Polygons, well... At least they show up, but I guess there is a projection problem :
regpol1 = mpl.patches.RegularPolygon((x,y), 100, radius=r, color = 'r')
cirpol1 = mpl.patches.CirclePolygon((x +50,y), radius=r, color = 'b')