It looks like you’re using an Execute operation (which doesn’t expect rows) to invoke something that definitely has a query. Those results will be silently ignored, which probably isn’t what you intended. Did you mean to use a Query API?

Bad:

conn.Execute("""
    select Id, Name
    from SomeLookupTable
    """);

Good:

var rows = conn.Query<MyLookup>("""
    select Id, Name
    from SomeLookupTable
    """);