Trouble with null coalescing operator

[persn]

Conside the following code

[Zomp.SyncMethodGenerator.CreateSyncVersion]
internal partial class Foo
{
    public async Task FooFooAsync(Bark? bar)
    {
        await (bar?.BarBarAsync() ?? Task.CompletedTask);
    }
}

[Zomp.SyncMethodGenerator.CreateSyncVersion]
internal partial class Bark
{
    public async Task BarBarAsync()
    {
    }
}

It generates the following

internal partial class Foo
{
    public void FooFoo(global::LateStartStudio.EmptySpace.SaveGames.Bark? bar)
    {
    }
}

As we can see, the code inside the method was dropped completely. I expected it to generate bar?.BarBar();