Unable to disable all $replace rules on a match #3791

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

AdGuard documentation linked to on the static filter syntax wiki page describes the ability to disable all $replace rules for a given match using the syntax @@||example.org^$replace. uBlock doesn't recognise this syntax, therefore it can't be used.

My use case is to disable a specific filter from the experimental filter list without using $badfilter or disabling the list entirely, as I have other provisions in place and don't want anything, present or future, from also applying itself.

A specific URL where the issue occurs.

https://www.photopea.com/

Steps to Reproduce

1. Visit https://www.photopea.com/ and check to see if the script mentioning width is present at the top of the head tag
2. Attempt to disable the $replace modifier by adding @@||photopea.com^$doc,replace to your custom filters (and enabling trust), then saving
3. Check the example site again to see if this script is gone

Expected behavior

The script provided by the filter should be gone as a result of the defined exception filter.

Actual behavior

The script is still present, and the logger reports Invalid filter (user-filters): @@||photopea.com^$doc,replace.

uBO version

1.65.0

Browser name and version

Firefox Nightly 144.0a1

Operating System and version

Fedora Linux 42