Mouse Position Is Wrong When Reparenting Window

Hi ,
We are currently dead in the water with this project, due to this issue. Is there any possibility for paid support by someone there at Epic who can get me off Top-Dead-Center with this issue? I would be more than willing to pay to have someone who understands the inner workings help get our team past this so we can complete our project, as the delays will be much more expensive for us. Alternatively, are there third parties knowledgeable with the engine viewport code that would be available to support us?

Thanks so much!