Shawburn: Submenu Hyphens Don't Display on iPhone

[donalirl]

Quick summary

On iPhone, hyphens and indentation don't appear on the submenu items. Works fine on Android though.

Steps to reproduce

1. Activate the Shawburn theme
2. Create a menu with submenu items
3. Observe submenu items are hyphenated on desktop and Android phones
4. Observe submenu items are not hyphenated on iPhone

What you expected to happen

I expected to see hyphens and indents like on Android:

What actually happened

Submenu items had no hyphens or indents on iPhone 12 and 15:

Browser

iOS Safari, Android Chrome

Context

#8074605-zen

Platform (Simple, Atomic, or both?)

No response

Other notes

No response

Reproducibility

Consistent

Severity

Some (< 50%)

Available workarounds?

No but the platform is still usable

Workaround details

No response