Some strange behavior a few of our users are experiencing: When they're typing in the free text field, they're randomly directed to this screen that just displays a loading spinner. My guess is they're hitting a key combination that's redirecting them to another PA viewer. So far, my searching the internet and trying multiple combinations hasn't been helpful.
Not aware of any known issues tied to this behavior. It looks like the web player is trying to access some content while they're typing, which isn't unusual. It's not clear what call they'd be generating that would interrupt this, though.