Occasional Contributor

We have a strange one and not sure if this is Teams related or SharePoint so here goes. This happens to a few users all using Teams collaboration with PowerPoint. They are all using Windows 10 1709 and Teams Desktop. When we open PowerPoint files from within Teams we select open in PowerPoint. This opens the file with the local PowerPoint app. We can be using the app for 10 mins or a few hours then suddenly it closes. It doesn't crash or give any warning, it just closes. Its like clicking the exit cross but we're not. Its affecting multiple users on different hardware. I've checked Events and nothing.


The reason I'm aiming it at Teams is it inst happening if I open a file from desktop or docs etc. Its only doing it from Teams.  


Driving me a little nuts. Anyone else seen this?

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