Bug when double name in permalien

we have a blog with a page like this :

domain.com/concours-photo/concours-photo-2017/

when some one go to any page of the site and is not logged, it will be logged thrue wp-cassify, it goes for every page of the site, but nor for this one.

I have found that wp-cassify change the url send as callback url. If the blog name (multisite) is concours-photo, and the name of the page start like the blog name wp-cassify put the blog name away so that

domain.com/concours-photo/concours-photo-2017/

will be

domain.com/concours-photo-2017/ as call back url.

so if the blog name is /hgrft and a page is /hgrft-bob-blabla

so the permalink will be /hgrft/hgrft-bob-blabla/

the call-back-url make by wp-cassify will be

/hgrft-bob-blabla/

because there is /hgrft twice.

is there a fix for this bug ?