Yes. This is enabled. Most probably this causes the problem. I will turn it off and watch for a while.
For other visitors of the topic, this is the explanation.
Caution : The Delta sync option has the potential to significantly speed up Sync, but it also has the potential to cause data errors.* AppSheet is only able to check Delta sync with cloud providers that use spreadsheet files. It checks the
LastModifiedTime property of the file to determine if it has been updated (updates could happen directly to the spreadsheet). In cloud file systems like Google Drive, this timestamp is not perfectly accurate.
The rest of the controls are just for your info.
No. It does not update.