Remote Site Password and Username won't save

I have an issue with a site I am working on, all the details store ok, however once I close the app and reopen Dreamweaver, I can no longer connect to the remote server that I am working on. Checking the remote site details panel shows that the site username and password are blank, and I have to reenter them again.

It's not a major deal as I am only working on one site currently, but if I was working on more that one it would become a real pain!

Any ideas why this is happening - is it a bug?

I am using the following:

Dreamweaver CC 2017.0.1 Release

Platform: OSX 10.10.5

Thanks

Marco

BTW I am really loving the new code theme: Raven Dark - it makes my code look really clear and beautiful