Not listing pages granted access via Facebook Business Manager

I just upgraded from 4.2.8 to 4.3.14 and realized SNAP is only listing pages which I am a direct admin/owner of the page, but is no longer listing pages I have been granted access through Facebook Business Manager.

After comparing changes between the versions and running some tests I found out the line which sets a User-Agent header for the graph api request (in nxs_snapClassFB->getListOfPages() ) is the cause of the issue. I am not sure how that is related but when I remove that line I can see all pages listed under ‘Where to post’ dropdown again.