Good point! Actually with 8.6.1 (released a few hours ago) we ignored paranthesis'es in comments, but I agree we should have consider strings too – whether quoted like 'this', “this” or `this`. I will ask the developer to comment on that tomorrow.
Parenthesis highlighting inside “double quoted string”, 'single quoted string' and `quoted identifier` is disabled now and will be available in the next release.