I have noticed the same issue when clicking though the links you mentioned or the links presented when completing a guide.  You can see the notification that the guide was loaded but nothing happens and the guide doesn’t change.  You will also then notice that the guide has crashed and will not respond to any input.  I then have to reload the UI via /console reloadui to get the addon to respond.  Your post is interesting because those are the exact guides I was trying to load in my other post.