Multiple Tags Not working

I have a column "acceptedCurrency" with type as "Tags". The source of this column is a SQL query. When I click on Select Options, I am getting list of options (or Tags) and when I select multiple tags from the list, they go into the Postgres DB as well (The data type of this column in DB is Varchar). But on retool I do not see any data and it always shows "Select Option".

When I change column type from "Tags" to "String" then values show up.

Any idea what's happening here?