Cannot type in editor on iOS Safari when system text size is set to maximum

[369work]

Description

When the iOS text size is set to maximum via Settings → Display & Brightness →
Text Size, tapping the post editor area in Safari shows the keyboard, but no
cursor appears and no text can be entered.

Step-by-step reproduction instructions

1. On iPhone, go to Settings → Display & Brightness → Text Size and set it to
   maximum
2. Open WordPress admin in Safari
3. Open a post in the Gutenberg editor
4. Tap on the text input area

Expected behaviour

The cursor should appear and text should be typeable normally.

Actual behaviour

Keyboard appears but cursor does not appear. Text cannot be entered at all.

WordPress information

• WordPress version: 6.9
• Gutenberg version: Built into WordPress (version unknown)
• Are all plugins except Gutenberg deactivated? No (live site, cannot deactivate)
• Are you using a default theme? No (using Blanky, a block theme)

Device information

• Device: iPhone 8
• Operating system: iOS 16.7.15
• WordPress app version: Not used (Safari browser)

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• Device: iPhone SE
• Operating system: iOS 26.3.1
• WordPress app version: Not used (Safari browser)