Creative save data, is not saving, loading or showing for any creative 1.0 maps. Please say this is a bug and can be fixed otherwise this is a map / player base killer.
Yes, it seems like save data simply is not loaded, this is the 2nd island killer in this patch.
@postboxpat Thank you for your report! We would like to look into this further, would you be able to submit a bug report using the form available here? Fortnite Creative