[v6 General Discussion] Powerpoint issue with EW

Last Sunday, we have experience some issues with Powerpoint. First, Powerpoint is not showing in Display Foldback. It was inconsistent because first when we are trying to open the pptx, it was working then suddenly when during the service, it wasn't showing in Display Foldback. and 2nd, powerpoint slides in the congregation view are showing only the quarter of the slides. it was working 1 week ago but now it is not. Is this a known issue? I am using Office 2019 on our computer. Hope you guys can help me with this issue as this can cause a big impact on our end. Thanks!