When a canonical is set for a term, page 2 of those term's archives will link to that canonical link with /page/2/ attached to it. So if http://www.example.com/example-tag/ canonicalizes to http://yoast.com/ then the canonical on http://www.example.com/example-tag/page/2/ will be http://yoast.com/page/2/. This is of course not intended and also impacts the OpenGraph URL.
Fix for #449
The commit above fixes this issue.