[Bug]: polygon from axvspan not correct in polar plot after set_xy

[keatonb]

Bug summary

When updating vertices of polygon produced with axvspan on polar axes, the resultant polygon does not seem to follow the polar projection.

Code for reproduction

import matplotlib.pyplot as plt

fig, axs = plt.subplots(1, 2, subplot_kw={'projection': 'polar'})

# What I expect
polygon1 = axs[0].axvspan(0,np.pi/2)
axs[0].set_title("What I expect")

# What I get
polygon2 = axs[1].axvspan(0,np.pi/2)
polygon2.set_xy(polygon2.get_xy()) #this should not change the polygon data
axs[1].set_title("What I get")

plt.show()

Actual outcome

Expected outcome

I expect that polygon2.set_xy(polygon2.get_xy()) should not change the polygon.

Additional information

No response

Operating system

OS X

Matplotlib Version

3.8.0

Matplotlib Backend

module://ipympl.backend_nbagg

Python version

Python 3.11.5

Jupyter version

7.0.6

Installation

conda

[QuLogic]

I believe this was fixed by #26788, and should be working in 3.9.0