Solution here. Thank you Jonathan from DO :
*A few things to keep in mind when using our console. Our Console uses a strict US keyboard layout. If you’re using an international keyboard, we recommend using an on-screen software keyboard set to use a US layout. While in the console, please do not use ALT+TAB to switch windows (or other such combinations, such as CTRL+TAB). The reason for this is because once you switch windows, the previous key pressed remains in the console until the next time you return which can cause some key buffer input issues.
Additionally, copy and paste does not work as it would with a terminal emulator (i.e PuTTy or Terminal) — input for passwords is also hidden. You will need to manually type in any commands and passwords when using Console.
To reset the console, you can reboot the Droplet which will ensure a fresh connection. If you’re not able to SSH in, you can power cycle the Droplet from our control panel.*