It works fine normally, but if the browser that opens the link is logged into DecileHub then instead of opening our deck it opens DecileHub's management system - I see this:

No idea what happens if someone logged into a different DecileHub account opens it.
This is annoying when you are testing your emails and may be an issue if we are trying to get somoene with a DecileHub account to be our LP since they would not get to our deck when they click the link.