It is a bug of Android. I have SGS5 with 6.0.1 and the same issue.
Android 6.0.1 and Samsung S5
ONLY ONE APP IS INSTALLED (LITCHI)
- Litchi is not set as Default App
- Plug USB cable
- Android pop up a window if I want to launch Litch and shows check box to set Litchi as Default App
- The check...