TMS320F2800137: Trip Zone ePWM - OSHT flag doesnt turn off via EPWM_clearTripZoneFlag()

Hi,

I've configure TZ for ePWM via ePWM-XBAR and ADC PPB properly (see following post regarding config )
Now when i'm latching one shot trip zone (OSHT) when measuring high current, working well !!
The issue is that i'm reducing current and then want to clear OSHT flag and DCAEVT1 flag via EPWM_clearTripZoneFlag() and it doesn't work.

The flags remain high 

Please advice, if pictures needed I'll add 

        EPWM_clearTripZoneFlag(PWM_BCK_BASE, EPWM_TZ_FLAG_DCAEVT1);
        EPWM_clearTripZoneFlag(PWM_BCK_BASE, EPWM_TZ_FLAG_OST);