Hi, first of all please try the latest beta (which is stable and should be released soon), its available here: http://kustom.rocks/klwp/apk
If you still have issues to better investigate the problem i need a full Android bug report from your device, in order to do so you will need to do the following:
Enable Android Developer options as described here
Enable USB Debugging in the developer options
The button "Bug Report" should become active
Reproduce the issue (so wait for the black screen)
Go into the dev settings and press Bug Report
Generated file might be big (>10MB), send me that via email