Bug report

Other backends properly call the close event, but it seems there is an issue with Agg specific to 3.4.

import matplotlib
import matplotlib.pyplot as plt
matplotlib.use('Agg')

def _close(event):
    print(event)


fig, ax = plt.subplots()
fig.canvas.mpl_connect('close_event', _close)
plt.close(fig)

matplotlib.use('Qt5Agg')
fig, ax = plt.subplots()
fig.canvas.mpl_connect('close_event', _close)
plt.close(fig)

Actual outcome

No call to close for Agg.

Expected outcome

Calls from both backends with print outputs.

Matplotlib version

• Operating system: All
• Matplotlib version (import matplotlib; print(matplotlib.__version__)): 3.4.0
• Matplotlib backend (print(matplotlib.get_backend())):
• Python version: ~3.8
• Jupyter version (if applicable):
• Other libraries: