Power BI visual filter uses incorrect varchar cast query

Hey there, I am not sure this is an issue from Power BI or the ODBC, please let me know if this is not where the issue stems from.

In Power BI Desktop I am getting the error in the attached image when I try to filter the values on a char type column using MariaDB Connector/ODBC.

From the trace log this looks to be the query that the filter is executing:

select `C1`

from

(

    select `trans_code`,

        ? as `C1`

    from `sales_order_test`

    where cast(`trans_code` as VARCHAR) = ?

) as `ITBL`

order by `ITBL`.`trans_code`

limit 1

The where cast(`trans_code` as VARCHAR) part is missing the length?

To repro:
Create the following in the MariaDB:
1. CREATE TABLE sales_order_test (trans_code char(3));
2. INSERT INTO sales_order_test VALUES('ABC'),('DEF');

Go to Power BI Desktop:
1. Go to Power BI Desktop -> 'Get data' -> 'MariaDB' -> 'Connect'
2. Select the sales_order_test db -> 'Load'
3. Select 'DirectQuery' for Connection Settings
4. Add the trans_code to 'Filters on this visual'
5. Filter on 'ABC' value and see the pop up error message.

Note: I have not been able to try this on the v3.2.2 MariaDB Connector, let me know if the newer version has fixed this

Any help would be much appreciated.