Hi,
It seems that the blueprint node (Open Level) do not work properly on Android device since the update 4.16
The node does his normal job on PC/Editor but does not load any level once you run your build on a mobile device “Android in my case”. I’ve tested a series of scripts between 4.15 / 4.16, it became clear that something is broken in the 4.16.
also experiencing this issue with my HTML game that i uploaded to my website, i hope it gets fixed, killing my portfolio 
Duplicate post here:
A lot of developers have the same issue with the new 4.16 on Android / HTML / Windows. Hope for an hotfix very soon.
Same issue.
Open an map empty from another empty map, it’s OK.
From Callback: blame of New GC in 4.16
New GC???
In my game , destructible function visit game mode, it works well On Windows, but not on Android. New GC is ok itself, but behave different on different platform.