I've noticed a downward trend for working apps from the MS Store for PCs and don't know if this is the issue.

Recent upgrade on Windows 10 (2IH2) on my PC and now I can't get Pinterest to show the content using the app downloaded from the store to the PC. It comes up for a couple of seconds, then disappears. The same thing was happening to Facebook (downloaded from the MS Store for PC) but it recently was fixed, seems like around the time Pinterest broke.

I'm not interested in taking a bunch of steps to try and see if that will fix it, especially since there seems to be a pattern of apps not working, and even disappearing. It's not as if I can't get Pinterest in a browser - it's just that using an app is easier and quicker. Mostly wanted to inform of the issue in case someone at MS is interested in fixing it.