ePWM波的相位TBPHS使用出现CMPA点与CMPB点瞬间断掉的情况是为什么？

使用PWM1与PWM2两路ePWM，通过TBPHS调整PWM2与PWM1相位，在调整的过程中，会出现有两个点（CMPA点与CMPB点）出现驱动瞬间断掉的情况，即在EPwm2Regs.TBPHS.half.TBPHS = 745（再将该值减1，就出现下图波形断掉情况），同样在EPwm2Regs.TBPHS.half.TBPHS = 835（再将该值减1，就出现下图波形断掉情况）也一样；请问各位大神，这是那个寄存器配置有问题？

PWM1与PWM2初始化如下：
void InitEPwm1(void)
[

EPwm1Regs.CMPA.half.CMPA = 835;
EPwm1Regs.CMPB = 745;   
EPwm1Regs.TBPRD = 1580;
   EPwm1Regs.TBPHS.half.TBPHS = 0x0000;           // Phase is 0
   EPwm1Regs.TBCTR = 0x0000;                      // Clear counter

   
   // Setup counter mode
   EPwm1Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; // Count up
   EPwm1Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;       // Clock ratio to SYSCLKOUT
   EPwm1Regs.TBCTL.bit.CLKDIV = TB_DIV1;//0x0-1分频,TBCLK = SYSCLKOUT / (HSPCLKDIV × CLKDIV)
    EPwm1Regs.TBCTL.bit.PHSEN = TB_DISABLE; // Master module
    EPwm1Regs.TBCTL.bit.PRDLD = TB_SHADOW;
    EPwm1Regs.TBCTL.bit.SYNCOSEL = TB_CTR_ZERO; // Sync down-stream module
   // Setup shadowing
   EPwm1Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
   EPwm1Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
   EPwm1Regs.CMPCTL.bit.LOADAMODE = CC_CTR_PRD;  // Load on Zero
   EPwm1Regs.CMPCTL.bit.LOADBMODE = CC_CTR_PRD;  
   // Action Qualifier SubModule Registers
   EPwm1Regs.AQCTLA.bit.CAU = AQ_SET;//AQ_CLEAR;
   EPwm1Regs.AQCTLA.bit.CAD = AQ_CLEAR;//AQ_SET;
   EPwm1Regs.AQCTLB.bit.CBU = AQ_CLEAR;
   EPwm1Regs.AQCTLB.bit.CBD = AQ_SET;
]

void InitEPwm2(void)
[
EPwm2Regs.CMPA.half.CMPA = 835;
EPwm2Regs.CMPB = 745;   
EPwm2Regs.TBPRD = 1580;
   // Setup TBCLK
   EPwm2Regs.TBPHS.half.TBPHS = 0x0000;           // Phase is 0
   EPwm2Regs.TBCTR = 0x0000;                      // Clear counter
   
   
   // Setup counter mode
   EPwm2Regs.TBCTL.bit.CTRMODE = TB_COUNT_UPDOWN; // Count up
   EPwm2Regs.TBCTL.bit.HSPCLKDIV = TB_DIV1;       // Clock ratio to SYSCLKOUT
   EPwm2Regs.TBCTL.bit.CLKDIV = TB_DIV1;//0x0-1分频,TBCLK = SYSCLKOUT / (HSPCLKDIV × CLKDIV)
    EPwm2Regs.TBCTL.bit.PHSEN = TB_ENABLE; // Slave module
    EPwm2Regs.TBCTL.bit.PRDLD = TB_SHADOW;
    EPwm2Regs.TBCTL.bit.SYNCOSEL = TB_SYNC_IN;//TB_SYNC_DISABLE; // sync flow-through
   // Setup shadowing
   EPwm2Regs.CMPCTL.bit.SHDWAMODE = CC_SHADOW;
   EPwm2Regs.CMPCTL.bit.SHDWBMODE = CC_SHADOW;
   EPwm2Regs.CMPCTL.bit.LOADAMODE = CC_CTR_PRD;  // Load on Zero
   EPwm2Regs.CMPCTL.bit.LOADBMODE = CC_CTR_PRD;  
   // Action Qualifier SubModule Registers
   EPwm2Regs.AQCTLA.bit.CAU = AQ_SET;//AQ_CLEAR;
   EPwm2Regs.AQCTLA.bit.CAD = AQ_CLEAR;//AQ_SET;
   EPwm2Regs.AQCTLB.bit.CBU = AQ_CLEAR;
   EPwm2Regs.AQCTLB.bit.CBD = AQ_SET;
]