I am running into a strange issue where the survey data failed to export:

Here're details and what we've been trying:
- The survey form was published to AGOL
- User's AGOL account, role, permission, group membership are all correct and the same as other folks who are able to export data.
- Tried Chrome, FireFox, Edge but all got the same "Filed to export" error. There is no details when clicking "Show details", only shows "Error".
- Monitored the network status and saw 200 response code.
- Tried with and without the vpn but it didn't make any difference.
- Tried several different machines.
- Sometimes the export function works and downloads the data (csv, excel, shp, etc.), but 99% of the time it just shows "Filed to export".
- Asked other members within the same group but didn't run into any errors.
At this point, I don't know what to tell the user.