Custom properties (--*): CSS variables marked with an issue in the editor

[Segmant]

When using Custom properties (--*): CSS variables in the CSS Editor you get a error

Expecting Rebrace at line xx

[sheabunge]

Thank you for reporting this – unfortunately, we currently use the CSS linter built-in to WordPress for checking CSS, and so we don't have any control over how frequently this is updated.

It might be worth looking into bundling our own CSS linter if this continues to be an issue.