This one's for SM-T705

Bug description: Navigation button not working frequently, and turns on Everytime touch is working
Affected version:MK71.2-klimtlte-201710191825-UNOFFICIAL
Steps to replicate: fix for nav buttons and OPTION FOR BACKLIT disable when touchpad is working

If you do not follow the format above when posting a bug report, it will delete or automatically be ignored. Without sufficient information, it is impossible for us to debug. Most probably the issue could be caused by your own inappropiate usage.