The bug
When creating a new installation/editing an existing one, attempting to close the installation icon menu while the version selector dropdown menu is also open will only result in the version selector dropdown menu being closed, and the icon menu will remain open.
This is inconsistent with doing the opposite: When attempting to open the installation icon menu while the version selector dropdown menu is open, the version selector dropdown menu will properly close and the installation icon menu will properly open.
How to reproduce
Open the Minecraft Launcher, and navigate to the Installations tab
Click the
New...
button in the top left cornerOpen the icon selector menu
Scroll down, and open the version selector menu
Scroll back up, and attempt to close the version selector menu
❌ Notice how the version selector menu closes, but the installation icon menu remains open
Video
A video of this issue occurring can be found here.
Thanks for reporting. However, It's a fairly minor issue, and therefore we will not be fixing this.