Cannot use variable as query target: $current DB name="test"

OrientDB Version: 3.2.2, same behavior with latest 3.0 and 3.1

Java Version: Java 8

OS: Linux (docker image)

Expected behavior

The query below successfully executes and returns empty result set on the empty DB - as was exhibited by OrientDB 2.2.x series.

Current SQL documentation puts no restrictions on the usage of the variables as query targets.

Actual behavior

The query below fails with

com.orientechnologies.orient.core.exception.OCommandExecutionException: 
     Cannot use variable as query target: $current DB name="test"

Steps to reproduce

• Create new database with the OrientDB Studio
• Execute following query

select $t from (select from v)
let
  $t = (select from $current)