Description

Shadow panel

• Open the site editor > global styles > Shadows > Choose one of the presets > click the Back button
• The editor crashes

Uncaught TypeError: Cannot read properties of undefined (reading 'shadow') at shadows-edit-panel.js:165:31

Font size preset panel

• Open the site editor > global styles > Typography > Font size presets > Choose one of the presets > click the Back button
• The editor crashes

Uncaught TypeError: Cannot read properties of undefined (reading 'fluid') at FontSize (font-size.js:57:12)

After investigating the problem using git bisect, I found that the problem was caused by #64777.

Screenshots, screen recording, code snippet

Shadow panel

Font size preset panel

Environment info

Gutenberg version: 19.3.0 (faa6968)