Could the League client window not appear in the forefront when it opens?
Twice now, I have had the issue that I go to log in, but forget that the League of Legends client log-in window isn't selected when it launches, and end up typing my password into a public Discord server, not even realizing. I don't get why it has to be like that, and I really wish it wasn't because it's a very frustrating mistake to make. I think, at least when it first opens, it should already be the selected window, just as any other application does.