"Sliding Sync Version is Missing" Error When Client has Been Configured and Discovered Native Sliding Sync (iOS)

[defaultdino]

When creating a Matrix Client using the Swift bindings for iOS, I get an interesting issue when I attempt to do the following:

let availableSlidingSyncVersions = await client.availableSlidingSyncVersions()
AppLogger.shared.info("Available Sliding Sync versions: \(availableSlidingSyncVersions)")
let syncService = try await client.syncService().finish()
await syncService.start()

I verify that the sliding sync version list is [MatrixRustSDK.SlidingSyncVersion.native] but the try await still fails instantly, saying that "Sliding sync version is missing". I have checked the source code for this SDK and don't see anything strange about the logic that could be causing this error:

 let version = self.version.unwrap_or_else(|| client.sliding_sync_version());

 if matches!(version, Version::None) {
         return Err(crate::error::Error::SlidingSync(Box::new(Error::VersionIsMissing)));
 }

Am I doing something incorrectly? The client is authorized and built with either .discoverNative or .native when making the client:

let client = try await ClientBuilder()
        .slidingSyncVersionBuilder(versionBuilder: .discoverNative)
        ...

Note:
Our /_matrix/client/versions does contain a org.matrix.simplified_msc3575 entry under unstable_features

[temurz]

I have changed
Session(
...
slidingSyncVersion: .native
)

to native it was .none, and then it worked properly