2021-01-20T11:57:35.888640+00:00 app[web.1]: /dashboard/src/routes.py:201: RuntimeWarning: More than 20 figures have been opened. Figures created through the pyplot interface (matplotlib.pyplot.figure) are retained until explicitly closed and may consume too much memory. (To control this warning, see the rcParam figure.max_open_warning).
2021-01-20T11:57:35.888665+00:00 app[web.1]: fig, ax = plt.subplots()
heroku logs --tail
At some point, there will be a waning like this: