Icons turn white when I source my vimrc

[agarrharr]

The icons are usually red or green, but after I run :source $MYVIMRC, then the icons turn white.

[ruanyl]

Can you get the right color if you switch buffer?

[agarrharr]

No, that doesn't seem to help. I have to quit and restart vim. Btw, I'm actually using Neovim (NVIM v0.2.0-379-g207ba359).