Shell highlighter triggers keybase notification showing invalid user

EDIT: See comment 3. This may not be due to a shell plugin after all.

When in /keybase/public or /keybase/private my shell highlighter seems to trigger Keybase to think I'm trying to entire a user's directory.

Video playback of the issue.

I realize that there might be a limited set of things that can be done since it might be an issue with the highlighter tool, but the error notification from Keybase seemed very misleading at first until I figured out the cause.

my log id: 25d5b2afd2a64bb2a47c2e1c

STR

1. Open shell using the below configuration.
2. cd /keybase/public or /keybase/private.
3. When in either directory, press a single keystroke followed by a space.
4. Observe the notification that shows up.

Alternative STR:

1. cd into /keybase/public or /keybase/private
2. Enter keybase search [any_user_id]
3. Observe.

Expected

1. This shouldn't kick off a keybase error notification.

Setup

Shell: zsh 5.0.5 (x86_64-apple-darwin14.0)
Syntax highlighter: zsh-users/zsh-syntax-highlighting
Notes: Also using oh-my-zsh.
Keybase GUI Version: 1.0.14-20160305214119+a203551

Start by reproducing the notification from /keybase/public or /keybase/private with zsh 5.0.5, using the listed shell highlighter and the alternative keybase search steps. Investigate whether the trigger comes from Keybase or zsh-syntax-highlighting; done means the misleading invalid-user notification no longer appears for the reported interactions.