BUG: PowerBI January 2017 update broke TOTALMTD()

Hi - It seems like the latest PowerBI update broke something in either TOTALMTD() function or perhaps an IF() function. The below pattern used to ensure that the MTD revenue total wasn't continued to dates in the future, but after the January update it stopped doing this. The chart now plateaus at the revenue for the current day and extends that out to the end of the month.

I'd been using the below pattern to limit the sum to the current month.

Cumulative MTD Revenue =
IF (
    MIN ( 'Date'[Date] )<= CALCULATE ( MAX ( Orders[invoice_date] ), ALL ( Orders ) ),
    CALCULATE (
        TOTALMTD (
            SUM ( Orders[actual_total_amount] ),
            'Date'[Date],
            FILTER (
                ALL ( 'Date'[Date] ),
                MONTH ( 'Date'[Date] ) = MONTH ( NOW () )&& YEAR ( 'Date'[Date] ) = YEAR ( NOW () )
            )
        )
    )
)