Grafana Loki: Custom variable with Stream selector {$label_name=~"$label_value"} is not correct works

I have a question regarding Loki label relations. Seems I found a bug.
Grafana: 10.2.6 Loki:3.0.0

I created label_name, label_value and loglevel variables.
label_value returns loglevel labels (INFO,WARNING and ERROR)

In the 3rd variable (loglevel) with tream selector {$label_name=~“$label_value”} → in the preview I don’t see level “ERROR”.

In the my dashboard, Label name: loglevel, Label Value: ERROR is exist
level show: INFO and WARNING but should ERROR as well.