Adding a new URL to a query on mwmbl.org with "Search Google" enabled redirects back to the homepage

[anijatsu]

While I have found another example for mwmbl/mwmbl/issues/158, I have also noticed that the issue only happens on a browser with this addon enabled. I have then noticed that it also only happens when I have the "Search Google" option enabled in the addon's modal window.

When making the query: "agile roles"
https://mwmbl.org/?q=agile+roles
I try to add the following URL:
https://neilkillick.wordpress.com/2013/09/05/scrum-basics-part-1-activities-not-roles/

I can either try and click on the Save button, or press Enter on my keyboard to confirm it, but I still get redirected to the homepage with an URL parameter like so:
https://mwmbl.org/?new_url=https%3A%2F%2Fneilkillick.wordpress.com%2F2013%2F09%2F05%2Fscrum-basics-part-1-activities-not-roles%2F

Maybe it's trying to make some sort of a duplicate check? Let me know if I can provide any more information.