WEBENCH® Tools/TPS54620: TPS54620 WEBENCH module error

Tool/software: WEBENCH® Design Tools

hello 

I used WEBENCH to simulate that TPS54620 startup with Vin. and the schematic diagram and component parameters are the same. 

but I found the simulation result is different from the waveform in datasheet.

this picture is in the datasheet of  TPS54620

this is simulation schematic diagram .

this picture is EN pin simulation result. obviously it's error.

and output voltage result is difference from datasheet.

and I verified this using TINA.  simulation from TINA is the same as datasheet and is different from WEBENCH.

so I think the WEBENCH module of TPS54620 has some mistake.

please give me some reply. thanks.