The submenu opens usually on the right side of the parent menu, when you get too close to the right border of the machine view window, it jumps to left side. So far, so good. But trying to move to that left sided submeni fails, it closes before you can reach it. As a matter of course you can avoid it by clicking always in the farer left side of the machine window, but yes, who is thinking that far ahead

I noticed a little gap between the highlighted selection and the submenu (see red arrow), that does not appear between parent menu and right sided submenu (see blue arrows).May be, that's the cause. it occurs with the default theme or any other modded theme
Is it a bug in buzz or something in my general window settings, which I am not aware of?
I am using buzz 1502, my monitor is set to 1920 x 1080 px