docsify: There is an error in opening the mobile page of the onlyCover parameter

Bug Report

Steps to reproduce

1. Setting param

window.$docsify = {
      onlyCover: true,
}

What is current behaviour

Should be removed, Otherwise, when you click it, the problem of Figure 2 will appear.

What is the expected behaviour

Other relevant information

• Bug does still occur when all/other plugins are disabled?

• Your OS: mac

• Node.js version:

• npm/yarn version:

• Browser version:

• Docsify version: 4.11.3

• Docsify plugins:

Please create a reproducible sandbox

Mention the docsify version in which this bug was not present (if any)