[Bug]: Text disappears while typing $

[tausiq2003]

Description: After enabling the zsh-syntax-highlighting and add it to .zshrc and source it, in command line after typing $ followed by any command, the text disappears.

Steps to reproduce:

1. Install zsh-syntax-highlighting, assuming you have zsh.
2. Add it to .zshrc, change

-  plugins=(git)
+ plugins=(git zsh-syntax-highlighting)

3. source it, source ~/.zshrc
4. Now type anything after typing $, text disappears.

How it should behave:

• Text shouldn't disappear.

Screen Recording:
https://asciinema.org/a/To40K2TpYKoexGYEB8daq6BYt

Terminal: alacritty
zsh version: 5.9
OS: NixOS and Docker(ubuntu)
Output of echo "$OSTYPE | $VENDOR | $MACHTYPE | $CPUTYPE | $(uname -m -p)": linux-gnu | pc | x86_64 | x86_64 | x86_64 x86_64

[danielshahaf]

The text doesn't "disappear"; it's still there, but in black / dark grey. By default that colour is only used for comments (when INTERACTIVE_COMMENTS is set). So, you might want to double check that the standard 8 colours render as something readable, both bold and non-bold variants (so 16 colour variants). Also, by default, `$echo` (with dollar) in command position would be highlighted according to the value of the variable literally named "echo". I suspect it's not z-sy-h doing that colouring. Does the problem occur in `zsh -f` after you run `source /path/to/zsh-syntax-highlighting.zsh` at the shell prompt? Thanks for all the details.