It's probably one of two things:
The cmdheight setting is 2 or higher; you can check the current value with :set cmdheight?, and set it to the default of 1 with :set cmdheight=1. There's something in your vimrc or a plugin changing from the default, you can use :verbose set cmdheight? to see where it was last set.
The terminal screen isn't quite big enough ...
Setting LANG to tr_TR.UTF-8 did solve the issue.
Turns out LANG being empty was the root cause:
I only checked through ...