I doubt whether there is a bug in the list/segments with different timezone.
We changed timezone from Asia/shanghai to America/New_York
then we created new list/segments, the Created_time is still Shanghai, and the result of Shanghai time zone is the same as that of New York time zone .
Theoretically, the two time zones are 12 hours apart.
My recommendation is to cross-reference the timezones on the profile with the Checkout Started event timestamps, to ensure that members of the segment align with the timezone expectations. If you notice a profile should not be included in the segment based on their timezone, share the particular email addresse(s) with our support staff and they will be happy to investigate for your further.
The time stamps under “Created” > “Lists & Segments” (June 16th, 2022 5:41 in your screenshot) is on the browser timezone (rather than the timezone set by your account). With that said, within the segment(s) themselves, the timestamps associated with each profile in the segment or list will reflect the account timezone.
My recommendation is to cross-reference the timezones on the profile with the Checkout Started event timestamps, to ensure that members of the segment align with the timezone expectations. If you notice a profile should not be included in the segment based on their timezone, share the particular email addresse(s) with our support staff and they will be happy to investigate for your further.