Pressing Enter allows bypass of password protection

[ZiggySchulz]

I have password protection turned on. Using the mouse to click the unlock button behaves as expected, but if I put ANY text in the password field (or leave it blank) and press Enter/Return I am allowed to proceed to the blocked website.
A dialog saying Incorrect password still appears.

Screenshots of the setup before pressing Enter:

Your environment

• version of the extension
  2.8.2
• which browser and its version
  Firefox 133.0.3

Steps to reproduce

Enable password protection and 'Require password to unblock websites'
Go to a blocked website
Press Enter with the password field focused
You will be taken to the website

Expected behaviour

You should be blocked

Actual behaviour

Not blocked

Attached are my settings:
settings.json