Bug report

Bug summary

Per the title.

Code for reproduction

from pylab import *
t = np.random.random((10, 10, 4))
ax = plt.figure().add_subplot()
ax.imshow(t, extent=(0, 2, 0, 2))
ax.imshow(t, extent=(1, 3, 1, 3))
show()

Actual outcome

Expected outcome

Matplotlib version

• Operating system: linux
• Matplotlib version (import matplotlib; print(matplotlib.__version__)): head
• Matplotlib backend (print(matplotlib.get_backend())): agg
• Python version: 39
• Jupyter version (if applicable):
• Other libraries: