Some glyphs don't get cleared from the screen (overwritten by space), which means they stay on the screen until another line is spawned in the same column. With the current implementation, this means that there will be a full column of the same character until another line overwrites it.
Some glyphs don't get cleared from the screen (overwritten by space), which means they stay on the screen until another line is spawned in the same column. With the current implementation, this means that there will be a full column of the same character until another line overwrites it.