Hi Andrew,
Just to clear up a few things, the autosave functionality introduced in 2.4, which is documented here Troubleshoot—Survey123 for ArcGIS | ArcGIS and here https://community.esri.com/groups/survey123/blog/2017/09/20/talk-like-a-pirate-release-24 is not the same as saving a survey to the Drafts folder.
Autosave will help recover an unsaved survey. If you are in the middle of a survey and the app crashes, you accidentally close the app without saving to drafts, or your device runs out of battery, when opening Survey123 app again the user will be prompted to recover the unsaved survey. The unsaved surveys are NOT saved to the Drafts folder as part of the autosave process. The unsaved survey is temporarily saved in the database on the device until the app is reopened, at which stage the user is prompted to continue or discard. The instance name used will not affect this functionality.
Saving a survey to the Drafts folder is done by selecting the close icon (X) in top left hand corner of the open survey and selecting the option to save to drafts. The survey can then be open again from Drafts folder, and will need to be saved again if the user wants to continually open and close the app and not lose changes. We currently do not have any known issues of the save to drafts option not working as expected. The instance name used will not affect this functionality, so naming the surveys the same is not the cause of the problem. The workflow for users that want to close and open Survey123 app so they can use other apps, is to ensure the save to drafts first, before closing the app.
Are you indicating that when user selects the saves to drafts option via the close icon in the survey, then close the app, that the survey does not appear in the Drafts folder later? If so can you please elaborate on this issue, give more specific details around the workflow (exact steps), device make/model, OS version, app version etc.
As for your second comment "last time I tried it the Inbox still wasn't pulling data in repeats back from the hosted services correctly" can you also elaborate on this, what exactly isn't working or being loaded in repeats? In version 2.5 of the app improvements were made to loading read-only text and note fields via the Inbox. Have you set the correct query parameters for querying repeats via the Inbox as documented here: Prepare for editing existing survey data—Survey123 for ArcGIS | ArcGIS
Hope this helps and please do come back with any further information to help troubleshoot these issues.
Regards,
Phil.