Vim mouse scrolling down causes display misalignment

[czbczb]

but mouse scrolling up is right，

this is my vim alias
alias vim="vim -u NONE -c 'set nocompatible mouse=a term=xterm encoding=utf-8 fileencoding=utf-8 fileencodings=ucs-bom,utf-8,latin1 termencoding=utf-8 ttimeout ttimeoutlen=100 updatetime=200 redrawtime=1000 backspace=indent,eol,start ttyfast number scrolloff=0 scrolljump=3 | highlight Normal ctermfg=255 guifg=#e9e9e9 ctermbg=23 guibg=#042028' --"

[czbczb]