The color of the bar is bleeding across the terminal, you can see an image of what it looks like here: bleeding bar color.
It started happening when I upgraded to zsh 5.7
zshrc version: zsh 5.7 (x86_64-pc-linux-gnu)
.zshrc config:
##
# Silver Prompt https://github.com/reujab/silver
##
SILVER=(status:black:white dir:blue:black git:green:black virtualenv:yellow:blue cmdtime:magenta:black
env:red:white:AWS_SHELL)
export SILVER_SHELL=zsh
export SILVER_DIR_ALIASES=$HOME/Development:
eval "$(silver init)"