I published a feature class with a related table to a feature service on ArcGIS Server. Both of them have attachment enabled. I then secured this feature service and registered it on ArcGIS Online. I then use the registered service to generate a Survey123 form. The form ID is set to the related table because I want to use this table to store signatures. I digitized some points in the web map. Then I opened the survey form, sighed the signature on the signature field and tried to send the survey. The form just hang there and saying "Getting Service Information...My Table Name...".
Why the data cannot go to the related table?