scrolloff strange update behavior

[siddharth99]

When I set a non-zero value of scrolloff parameter the nyaovim window produces a strange behavior on certain commands.

Screenshot on This Problem

Original Windows with scrolloff=5; and cursor at 5th last line of the first window-pane

After pressing 'o'; the top tabbar moves down along with bar separating the 2 panes

After pressing 'Enter' a few times; the bars keep moving downward and everything is scrambled

If I change tabs to redraw; everything seems fine.

Steps to Reproduce (including precondition)

Without using any custom config file with neovim & nyaovim config; follow the above screenshots

Your Environment

• OS: Ubuntu 16.04
• NyaoVim version 0.1.1
  electron : 1.7.9
  chrome : 58.0.3029.110
  node : 7.9.0
  v8 : 5.8.283.38
• nvim version: nvim --version
  NVIM v0.2.2-34-g8fff2ef74
  Build type: RelWithDebInfo
  LuaJIT 2.0.5
• Keyboard layout: US English
• Linux: Window manager: Mate
• Empty vimrc