This has likely been fixed in newer engine versions already, but for anyone else who’s stuck on 5.5.0 until meta updates their fork, here’s something I discovered.
If you have a widget component (world space) and it contains a widget switcher or some other thing that would require redrawing your UI, this currently won’t update when you interact with it. If you need to get past this, setting the widget component to always tick even when out of player view will cause the widget to update.
There’s been a slew of other similar issues in 5.5.0 related to things being considered in the players view frustrum or not. So if you’re having an issue, check if there’s an option related to that first.