Hi @alie4hunt ,
Please check whether the formulas entered for StartDate and EndDate in your create event are respectively:
convertTimeZone(outputs('Update_item')?['body/StartDate'],'UTC','Singapore Standard Time','yyyy-MM-dd HH:mm:ss')
convertTimeZone(outputs('Update_item')?['body/EndDate'],'UTC','Singapore Standard Time','yyyy-MM-dd HH:mm:ss')
I'm guessing you've written the same formula.
Best Regards,
Sunshine Gu