The issue pops up when you resize the desktop, as is commonplace when you use VNC across multiple machines.
A good workaround for this issue is to install the latest Oracle Java 8.
If you are using Ubuntu, you can add the Oracle 8 ppa:
sudo add-apt-repository ppa:webupd8team/java
sudo apt update
sudo apt install oracle-java8-installer
The option that lets you achieve this is let g:julia_set_indentation=0. You can place this in your .vimrc. You can find this option using :h julia-vim at the very bottom of the help page. Note that this goes against the Julia community's style guidelines.
I use vim-plug to manage my addons. If you use another addon manager, then you might have to edit the beginning to suit your needs.
call plug#begin()
Plug 'JuliaEditorSupport/julia-vim'
call plug#end()