Taking http://www.extremetech.com/ as an example, it contains <div class="" style="display: inherit ! important;" id="jivvmzil">.

The inlined CSS overrides the rule extremetech.com###jivvmzil, meaning the element remains visible despite being matched by the rule.

The expected behavior would be that the element hiding rules precede any inline style, including when it uses the ! impotant modifier.

Tested with uBlock Origin 1.3.6 on Firefox.

One possible solution would be, to forcefully apply all matched element hiding rules to the DOM, stripping all matched elements from possible inline CSS.