Bug summary

The size of the text in fig.suptitle is different if I specify the size of the text directly, or inside the fontdict={...}

Code for reproduction

import matplotlib.pyplot as plt

fig = plt.figure(figsize=(8, 3), layout='constrained')
f0, f1 = fig.subfigures(1, 2)
f0.suptitle('xxxXXX', fontdict=dict(family='Candara', size=30))
f1.suptitle('xxxXXX', size=30, fontdict=dict(family='Candara'))
plt.show()

Actual outcome

Expected outcome

I expected text of the same size.
In the example, I have used subfigures but using a figure (twice) I had the same results.
Further, using a single figure with 2 subplots, ax0.set_title(..., size=..., fontdict{...}) and ax1.set_title(..., fontdict={..., size=...}) gives titles with the same size.

Additional information

No response

Operating system

Suse Tumbleweed

Matplotlib Version

3.6.3

Matplotlib Backend

QtAgg

Python version

3.11.6

Jupyter version

Ipython 8.18.0

Installation

Linux package manager