bug in fresh install

hi, just installed beta 17 on my mac os x (10.11.6) and seem to have found a bug.
whenever i try to use the mouse to get to the right third of the screen the mouse can’t seem to go there, while the keyboard arrows can take me to whatever is there.
my system is in english (both operating system and kodi).
i use a macbook pro late 2013 retina 15″, with 2.6 ghz core i7 cpu and 16GB of RAM.
seems to be persistent issue.