If you're flying around on keyboard control, once you open the console, all of the keystrokes from flying get turned into text input and stuck into the console.
All this does is make spurious chat messages, since it usually doesn't start with a /, but it's still annoying.
This seems like it stems from a change in SDL1.2 -> SDL2 since it's mentioned here: https://wiki.libsdl.org/MigrationGuide#Input
If you're flying around on keyboard control, once you open the console, all of the keystrokes from flying get turned into text input and stuck into the console.
All this does is make spurious chat messages, since it usually doesn't start with a /, but it's still annoying.