PowerBI mixed mode SQL with cast() in WHERE clause

Hello,

I have a PowerBI model composed of 2 tables connected to MariaDB:

• DIM_DATE - Import mode
• FACT_TRAN - DirectQuery mode

The 2 tables have a relation using Date_SK, which is of int datatype in both tables.

I've added a slicer with a date range, using [Date] column (datatype is date) from DIM_DATE table.

When I select a single date in the slicer, the query submitted to the fact table does a CAST() in the WHERE clause which prevents usage of the index in the fact table.

select count(1) as `C1`
from
(
select `TRAN_ID`
from `FACT_TRAN`
where cast(`TRAN_DATE_SK` as INTEGER) = 20220303
) as `IT

However, when I select a date range greater than 1 date the CAST() isn't applied anymore.

select count(1) as `C1`
from
(
select `TRAN_ID`
from `FACT_TRAN`
where `TRAN_DATE_SK` in (20220303, 20220304, 20220305, 20220306, 20220307, 20220308)
) as `ITBL`

You can easily reproduce this case.
I'm using latest version of Power BI Desktop and MariaDB Connector for PowerBI.

Please can you fix this bug so that when selecting a single date in the slicer there will be no cast in the WHERE clause anymore, which prevents index use,

Thanks.