DateTimeStart function unexpected result

[LeiCong]

I'm using DateTimeStart function to maintain a constant timestamp for my current workflow iteration. Partway through the workflow, however, the field that holds this timestamp changes and increases by one second. Does anyone else experience this? Isn't the function of this function to capture a timestamp of the moment when I first click "Run", or am I using this function incorrectly?

[MichalM · Accepted solution]

@LeiCong 

DateTimeStart should indeed return a timestamp of when the workflow started running so I wouldn't expect it should change. Could you just generate it once and then use Append Fields to attach it wherever you need?