Thanks for confirming this for me. I wanted to make sure whether this is a known issue or a new one. This lets me log them properly so both could have gotten fixed, and to also keep the public portal neat and tidy.
That could have been the case, I have tried it again and isn't reproducible by just clicking on the menu item. As long as this behaviour is fixed in an issue, i'm fine with this one being closed.
I tried reproducing an issue when I am sure the mouse didn't go over Item 2, but I was unable to. I am attaching a short video from my test so you can confirm if I am missing something. Could you also clarify what you mean with "select with the mouse" - does this require a click, a click+hold+drag to create selection, or only hovering the menu item?