Bug summary

The chart is incorrect for a specific number (19.607843137254918). I am not creating this number manually. Instead I get it from a pandas data frame. I have no control over what data I get so I am not sure about what is special about this number that causes a wrong chart.
Please look at the

Code for reproduction

from matplotlib.pyplot import figure
import matplotlib.pyplot as plt

figure(figsize=(8, 6), dpi=100)
plt.plot([19.607843137254903, 19.607843137254903, 19.607843137254903, 19.607843137254903, 19.607843137254903, 19.60784313725489, 19.607843137254918])
plt.show()

Actual outcome

Expected outcome

Please see the Y-Axis of the attached image to see what is wrong. I expect a plot with Y-values around 19. But instead the plot shows 5.5 with a scale that is 1e-11+...

Additional information

No response

Operating system

OS/X

Matplotlib Version

3.5.1

Matplotlib Backend

No response

Python version

Python 3.9.10

Jupyter version

No response

Installation

pip