CCS/TMS320F28379D: Action Qualifier Continuous S/W Force (AQCSFRC) Register and PWM first pulse

Part Number:TMS320F28379D

Tool/software: Code Composer Studio

Hello everyone, 

I am making a Program in which I use commands:

EPwm1Regs.AQCSFRC.bit.CSFA = 0; 

EPwm1Regs.AQCSFRC.bit.CSFB = 0;

EPwm1Regs.AQCSFRC.bit.CSFA = 2; 

EPwm1Regs.AQCSFRC.bit.CSFB = 2;

to control PWM output. The problem, that I have encountered is the first PWM pulse after the switching PWM on with:

EPwm1Regs.AQCSFRC.bit.CSFA = 0; 

EPwm1Regs.AQCSFRC.bit.CSFB = 0;

By default I use the duty cycle of 20% but the first pulse after start seems to be ~50% +-10%.

I want to ask, could I somehow solve this problem? Or this is hardware default so? May be there is some another way to turn quickly PWM on and off?

Thank you in advance!