Using custom video Effects with MediaElement

Question

I have an application that uses MediElement to play videos and provides it with a custom video effects implemented in C++\CX via MediaElement.AddVideoEffect method.

https://msdn.microsoft.com/en-us/library/windows/apps/windows.ui.xaml.controls.mediaelement.addvideoeffect

And it works just fine. But there is a bit of a problem, - When user hits the "Pause" button, MediaElement stops calling ProccessFrame method of the video effects I attach. Which leads to the situation, when user can tweak his effect whilst video is playing, but cannot do it on Pause.

So basically, I'm wondering if there is a workaround.

Thank you for the time and effort.

Kind regards.