UWP MediaPlayerElement in WindowsXamlHost. MFPlat.dll error

we are using a UWP MediaPlayerElement added to a WindowsXamlHost Control for a WPF Video Player App. After some time of playing a 0xc0000005 error is thrown by a MFPlat.dll and the App crashed. I found out that the 0xc0000005 exception stands for a memory access violation and the MFPlat.dll is part ob the Windows Media Foundation.

Has anyone ever had such a problem and maybe a solution for that?

EDIT: The error comes only when the videos have a 4K/UHD resolution, seemingly.