Hi Phoebe,
1)you've updated successfully?
Checked in powerapp gallery, data populated without issue, able to search and edit
2)someone not deleted your data?
Tested with another environment admin, both verified data disappear in few hours.
3)you have permission to write data in CDS?
I would like to elaborate more info on this part. Canvas app was created on Environment A, imported to Environment B. Create CDS at Environment B, connect to APP. Does permission affected in such configuration. If yes, which part of the permission settings I should verify ?
But if it is permission issue, how data from excel successfully published ?
Many Thanks