Lines magically disappearing with colorscheme

Hello, I am having trouble with customizing my NeoVim. I just set the color scheme with colorscheme morning and what appears to be happening is that when I enter the file the first line in the file gets deleted. This is my init.vim:

syntax on
colorscheme morning

set tabstop=4
set shiftwidth=4

set exrc
set guicursor=

set relativenumber
set nu


set smartcase
set incsearch
set nohlsearch
set smartindent

set nowrap
set scrolloff=8

set noswapfile
set nobackup

However the missing first line isn’t the only issue that occurs. There are also bugs with selection where letters disappear or keep their highlighted background after being selected.
Anyone know how to fix this? Thank you in advance!