Pixel streaming crashes when lauching a packaged game in full screen at high resolutions. Work around is for force a 1080p window mode session and switching to 4k via HTML after it's in window mode also causes the same crash. This previously didn't cause a crash when switching via html but now does.
Package a pixel streaming demo set to launch full screen native resolution.
Run the two batch files for local server testing.
Run the packaged unreal .exe on a wide scrren monitor. My monitor is 3440x1440.
It should crash with an error message which is attached.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-66799 in the post.