Bug report

When I transform a MarkerStyle, it displays fine in the plot but not in the legend.

Code for reproduction

import matplotlib.pyplot as ppl
from matplotlib.markers import MarkerStyle

hdiamond = MarkerStyle("d")
hdiamond._transform.rotate_deg(90)

ppl.plot(0, 0, marker = hdiamond, label = 'foo', ls = 'None')
ppl.legend()

ppl.show()

Actual outcome

Matplotlib version

• Operating system: macOS 10.15.7 (19H15)
• Matplotlib version: 3.3.4
• Matplotlib backend: MacOSX
• Python version: 3.7.10