How frequently does the bug occur?

Always

Description

I have a React Native app with Realm and Device Sync configured as per the starter docs.

I am trying to use Expo TaskManager to run a background task where location data is written to Realm.

The background task runs in global context, outside of React, so I cannot access use hooks to access the Realm context.

So I attempt to connect to the Realm with Realm.open(), using identical configuration and the app.currentUser (anonymous auth) but I get this error:

TaskManager: Task "LOCATION_TRACK" failed: [Error: Realm at path '/data/data/[redacted]/files/mongodb-realm/[redacted]/[redacted ID]/flx_sync_default.realm' already opened with different sync user.]

I understood from this comment that I should be able to open the Realm twice successfully without error:
https://github.com/realm/realm-js/issues/6273#issuecomment-1869013164

Stacktrace & log output

TaskManager: Task "LOCATION_TRACK" failed: [Error: Realm at path '/data/data/[redacted]/files/mongodb-realm/[redacted]/[redacted ID]/flx_sync_default.realm' already opened with different sync user.]

Can you reproduce the bug?

Always

Reproduction Steps

Create an expo app with Realm and Device Sync configured as per the starter docs.

Realm works correctly inside React using hooks.

Attempt to open the Realm outside the React context, using the same config, and get the error.

const app = new Realm.App({ id: ATLAS_APP_ID });

    const realm = await Realm.open({
      schema: [LocationLog],
      sync: {
        flexible: true,
        user: app.currentUser,
      },
    });

Version

^12.6.0

What services are you using?

Atlas Device Sync

Are you using encryption?

No

Platform OS and version(s)

Windows

Build environment

No response

Cocoapods version

No response