Endnote Capture Reference not suggested correct credentials

Sunflower

I use an addin for Endnote Web, called 'Capture Reference'. It's a bookmarklet - see here (https://support.clarivate.com/Endnote/s/article/EndNote-Capture-Reference-Tool?language=en_US)
When it pops up, I have to enter my Endnote credentials. 1Password always used to suggest my Endnote credentials, but now has started to suggest credentials related to the underlying page I'm browsing, and there's no way to search for different credentials in the drop down. So I have to copy my credentials across.
Is there a reason why 1Password doesn't recognise the bookmarklet as always needing Endnote credentials?

I tried to paste the javascript of the bookmarklet, but I got blocked!