Boot to Qt - qtlauncher crashes with out-of-memory

Starting with Qt 5.11 Cinematic Experience demo is excluded from the default set of demos although it's still one of the most nice and impressive demos that we have despite the fact that it's a 3rd-party one (which doesn't speak highly of our competence). I would keep it enabled.

But anyway, having enabled and launched it I got a crash of qtlauncher with "out of memory" error. It happens when you try to close the launcher menu/tray on top of the screen. I guess, the same can happen with any other demo, but so far I've noticed it only with this one.

Noticed similar behavior with Charts demo too, although it doesn't crash, but closing/opening tray goes really slow and htop shows CPU usage through the roof.