I've found a bug in Metrics: If I try to edit the query in Query Settings, which is made using the query builder, and hit "Save", my query is replaced by the auto-generated SQL query. I then have to edit the metric again and specifically select the query builder. Also, the "User Type Supported" seems to reset when this happens.
I would assume the SQL query should be identical to the query I built with the query builder?
See the attached the recording for an example.