[Bug] Multiscreen-Fullscreen-Borderless Issues

At first had been playing in Borderless mode that i could easely switch to my browser a.s.o. But during changing direction when walking often my curser was "outside" of the screen and switched to my browser or other programs that had been opend on my second and or third monitor. So i changed the settings to Fullscreen. The issue witch it changed between programs stopped. But now the curser will still go to an other monitor when i´m in any menu/inventory.
When i´m playing in Fullscreen the curser should never leave the games screen, or am i wrong here?
Even in borderless the courser should not move outside while walking, here only when opend a menu/inventory.

Sorry for my bad english.