How record a date automation work?


Hi, I'm having trouble using the record a date automation.

as you can see in 1st picture, I create record a date when "send noti to slack" is checked

in 2nd picture, every change I made in that check box is from 25-Nov-2021 but record date show 24-Nov-2021

does anyone know why? and what I have to do to make it record the day I check the box (25-Nov-2021)

Thank you very much.