Dark UI makes element picker mode blackout the page #3624

Prerequisites

• I verified that this is not a filter list issue. Report any issues with filter lists or broken website functionality in the uAssets issue tracker.
• This is NOT a YouTube, Facebook or Twitch report. These sites MUST be reported by clicking their respective links.
• This is not a support issue or a question. For support, questions, or help, visit /r/uBlockOrigin.
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue.
• The issue is not present after disabling uBO in the browser.
• I checked the documentation to understand that the issue I am reporting is not normal behavior.

I tried to reproduce the issue when...

• uBO is the only extension.
• uBO uses default lists and settings.
• using a new, unmodified browser profile.

Description

When Dark UI is enabled in Ublock settings, element picker mode turns the page black and all I can see is the red outlined highlight box until I exit element picker mode. WHen I select Light UI, element picker mode works as intended I can see the page and get highlight boxes on what I can pick to remove.

A specific URL where the issue occurs.

Google.com

Steps to Reproduce

Enable Dark UI in settings, refresh webpage and select element picker mode

Expected behavior

For this not to happen and for it to show the webpage with the red outlined highlight box showing me what I can remove

Actual behavior

The page turns black with only the red outlined highlight box showing where I can remove items but I can't see WHAT i'm selecting

uBO version

163.3rc0 and 163.3.rc2

Browser name and version

Supermium 132, Chrome 118, Firefox 114, Firefox 115

Operating System and version

Windows 7 64-Bit and 32-Bit