Right clicking on main menu causes UI to jump

[Atilist]

This bug is tiny and does not break functionality of the game. When right clicking anywhere on the main menu (the one that immediately shows up after launching the game), it causes the menu box in the middle to briefly stretch to upper and lower bound of the screen and then return to normal size. This bug is small so this is all there is to it

Update: I have discovered that left clicking does the same thing