Null reference error from PrintHelper

Describe the bug

We are occasionally getting null reference errors from users in our logging, originating from the PrintHelper.

I haven't been able to reproduce the issue, only seen in the logs, I have provided the stack trace.

Is the fix as simple as adding a null ref check in the PrintHelper class?

    System.NullReferenceException: Object reference not set to an instance of an object.

    Microsoft.Toolkit.Uwp.Helpers    PrintHelper.<DetachCanvas>b__39_0 () /_/Microsoft.Toolkit.Uwp/Helpers/PrintHelper/PrintHelper.cs at 227:21
    System    Action.Invoke ()
    Microsoft.Toolkit.Uwp.Helpers.DispatcherHelper    <>c__DisplayClass11_0.<AwaitableRunAsync>b__0 () /_/Microsoft.Toolkit.Uwp/Helpers/DispatcherHelper.cs at 258:21
    Microsoft.Toolkit.Uwp.Helpers.DispatcherHelper.<>c__DisplayClass10_0$1<System    __Canon>.<AwaitableRunAsync>b__0 () /_/Microsoft.Toolkit.Uwp/Helpers/DispatcherHelper.cs at 235:21
    System.Runtime.ExceptionServices    ExceptionDispatchInfo.Throw ()
    System.Runtime.CompilerServices    TaskAwaiter.ThrowForNonSuccess (Task)
    System.Runtime.CompilerServices    TaskAwaiter.HandleNonSuccessAndDebuggerNotification (Task)
    System.Runtime.CompilerServices    TaskAwaiter.ValidateEnd (Task)
    System.Runtime.CompilerServices    TaskAwaiter.GetResult ()
    Microsoft.Toolkit.Uwp.Helpers.PrintHelper    <DetachCanvas>d__39.MoveNext () /_/Microsoft.Toolkit.Uwp/Helpers/PrintHelper/PrintHelper.cs at 238:13
    System.Runtime.ExceptionServices    ExceptionDispatchInfo.Throw ()
    System.Runtime.CompilerServices    TaskAwaiter.ThrowForNonSuccess (Task)
    System.Runtime.CompilerServices    TaskAwaiter.HandleNonSuccessAndDebuggerNotification (Task)
    System.Runtime.CompilerServices    TaskAwaiter.ValidateEnd (Task)
    System.Runtime.CompilerServices    TaskAwaiter.GetResult ()
    Microsoft.Toolkit.Uwp.Helpers.PrintHelper.<>c__DisplayClass40_1    <<PrintTaskRequested>b__2>d.MoveNext () at 16707566
    System.Runtime.ExceptionServices    ExceptionDispatchInfo.Throw ()
    System.Runtime.CompilerServices.AsyncMethodBuilderCore    <>c.<ThrowAsync>b__7_0 (Object)
    System    Action`1.Invoke (T)    
    System.Threading.WinRTSynchronizationContext
    Invoker.InvokeCore ()    System.Runtime.InteropServices    McgMarshal.ThrowOnExternalCallFailed (Int32, RuntimeTypeHandle)
    __Interop    ComCallHelpers.Call ($__ComObject __this, RuntimeTypeHandle __typeHnd, Int32 __targetIndex) Call at 15732480
    __Interop.ForwardComStubs    Stub_11<System.__Canon> (Void* InstParam, $__ComObject __this, Int32 __targetIndex) Stub_11 at 16707566
    Microsoft.AppCenter.Utils    ApplicationLifecycleHelper.<ctor>b__17_1 (Object sender, $UnhandledErrorDetectedEventArgs eventArgs)

Environment

It doesn't seem to be specific to any device, Toolkit or Windows verison.