DRV8434AEVM: UI and Design Issues of DRV8434AEVM

Tool/software:

I would like to ask a question.
Recently in the use of DRV8434A DEMO BOARD test, in the DRV8434A UI interface there is a clear button as shown in the following figure, when I will motor travel to the end of the terminal after the intentionally generated STALL signal, after pressing clear can not clear the Fault status and the Stall Report Status faults, but there are Sometimes it can be cleared again, or it can be cleared after a few steps in the opposite direction. However, when I look at the nSLEEP signal with an oscilloscope, I can see that it is pulling LOW about 33us, which is in accordance with the timing diagram in the Data Sheet. May I ask why?