I've looked trough theme file and after I've disabled following ruleset (line 335)
- Code: Select all
<string>source entity.name.tag, source entity.other.attribute-name, meta.tag.inline, meta.tag.inline entity</string>
everything became all right and selectors was highlighted.
I assume that there is some bug in rulesets priorities or weights, since this rule was overriding more specific CSS selector rules.