Mobile navigation menu not clickable in FilePicker.aspx

[erzaehlsalex]

Description

The mobile navigation menu (hamburger menu) in FilePicker.aspx is not clickable/tappable on mobile devices, making it impossible to navigate through the file picker interface on mobile.

Steps to Reproduce

1. Open the OneDrive File Picker on a mobile device using this URL structure:
   https://{tenant}-my.sharepoint.com/_layouts/15/FilePicker.aspx?filePicker={...}
2. The page loads and displays a hamburger/mobile menu icon
3. Attempt to tap/click the menu icon
4. Expected: Menu opens showing navigation options
5. Actual: Nothing happens, menu is unresponsive

Environment

• Browser: Chrome (mobile)
• Device: Mobile device (reproducible across devices)
• File Picker SDK Version: 8.0
• SharePoint: SharePoint Online

Additional Context

• The issue occurs even when opening the FilePicker.aspx URL directly in a new tab (isolated from any parent application)
• Desktop version works as expected
• This makes the File Picker completely unusable on mobile devices as there's no alternative way to navigate

Is this a known issue? Are there any workarounds available?