After using Realm Studio to view the local realm file that is generated when I run my app using the Xcode Simulator, I can confirm the requireCareSummary field is displayed as expected. I’ll try seeing if I can match the device and iOS version of one of the users experiencing this error and see if that changes anything about the realm file field name.
If a schema change is breaking, or the client file is too outdated, the SDK will perform a Client Reset anyway, be sure to handle that properly instead.
My app is currently setup to handle client reset errors if an error caught by the syncManager.errorHandler is of type RLMSyncErrorClientResetError. The error in question is not of that type, so I am not currently performing a client reset.