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LM5109B-Q1: Given input(PWM), no output waveform

Part Number: LM5109B-Q1

When testing the circuit, the customer found that when HI(pin2) and LI(pin3)  have PWM input signal, there was no waveform at TP161 (pin-HO) and TP149 (pin-LO). When he set pin-HI to a low level for a while, the voltage at pin-HO is measured to be about 3V. Among them, in the actual test C22  is 100nF.

Could you please help to solve the problem?

Thank you very much!