I started my game with the console on, but it does not fill its entire window. Clearing all the logs or scrolling does not change anything. Moreover when I resize the window the scroll bar moves to the right but the size of the window remains the same.
This bug is not very problematic but it's annoying.
Hello! Thanks for the report, however this is already being tracked as MCL-17432. This issue is actually fixed for the current beta version.
To enable the beta, select the Settings tab (in the bottom left corner of the Minecraft Launcher), and then check the first box. Close and reopen your launcher, and the issue should be fixed!